that would be nice, yes.
However, i would still want a user-Replaceable mount option like the four M4 Holes on the Front of the 1.4 and 2.1, since on an S35 Sensor of that resolution, if used at The FullHD 1461fps Setting (which is rather likely to be used pretty frequently), the effective sensor-Size will be around 1" or even smaller, would need to look up actuall dimensions of the Sensor to calculate that accurately, but rather small active sensor area. For that, or even higher framerates, you would still want an option to use MFT Lenses or even C- and CS-Mount for really high framerates and therfor very small effective sensor area. Just imagine trying to get an wide angle Shot at one of the Lower resolution settings like 480p or something. Pixels on that sensor are still smaller than the pixels on the 2.1! And all the Lens mounts you listed only have Lenses for rather large sensors, meaning you would end up using Ultrawide-Angle Lenses or fisheye lenses a lot if you would want an reasonable wide shot on low resolution. To be fair, All the Mirrorless mounts you listed would allow for using an Adapter for C-Mount lenses, but if you want CS-Lenses for the very high framerate options, which could happen, you wouldnt be able to mount them.
While this is a nice camera with some solid horsepower, its in a somewhat weird spot, to be honest. If i was looking for 4K with high framerates, i am propably looking for some serious image Quality also, so it might be better to look into buying an Cine Cam which allready does that. there are a bunch out there, that can do 4K at high framerates, that just lack the Super High Framerate options the Chronos Cameras have at very low resolutions. Someone who wants to use it for Filmmaking only and doesnt need an Actuall highspeed camera, that can do 10kfps++ are might better of getting one of those. Just as an example a lot of the higher end Sony and RED cameras have High framerate options, and there are also a lot of less known brands that will do some kind of decent Higher Framerates, but those cameras are highly focused on filmmaking and wont have the Highspeed options the chronos has. While most of them wont reach the Framerates at the Resolutions you listed (some not even close to that), i assume that they would propably hard to beat in terms of image Quality by this Chronos.
As much about the 4K. If an 4K Chronos would be available at an extremely competitive price, that would maybe change things a bit, and make it worth a second thought, but else, if you just want cine-Level 4K at a bit higher Framerates, and you allready spending a few thousand $, might allready buy an cine-Camera and get really nice Image Quality.
Now Full HD at 1,5kfps is quite a bit more interresting in my opinion. But then again, if you end up using it at fullHD anyways, just maybe build a camera around some sensor that can push 1,5 to 2,5 kfps (or way more), and is not as small as this. the FullHD Sensor Area is way smaller than even the 2.1 Sensor.
So, as i allready said, that puts it in an weird spot, since for higher framerates, the effective crop factor ends up beeing worse than on the 2.1 and propably even 1.4, making it somewhat weird to use as an Actuall highspeed-Camera (i dont really know anything about the Camera Sensor itself or how good it is, but with pixels that small, unless its way better then the other ones, i am not sure about sensitivity), and as an High-End/Highspeed Cine-Cam, it would also propably be somewhat disapointing to some people. I tried to use the 2.1 for filming real time footage or other Framerates one would maybe want to use on such a cameras, and its just built as an Highspeed camera, it wants to go fast, wont really work at below 60fps. I think if something like this 3.7 Chronos you imagined here would want to do well as some kind of Cine-Cam Highspeed Crossbreed, i think Signal processing (especially black calibration below 60fps and dealing with sensor noise in general, not sure if thats down to signal procesing, thermals or whatever....) and lower fps options need quite a bit of work. Also White-Balance User interface and the Whole Color settings (the Color Matrix is kinda weird to use, and not really intuitive) in general, as well as things like Lack of exposure indicator or at least some kind of Histogramm would drive a bunch of the target Buyers of such a camera mad, so prepare for some crazy haters and angry costumers incoming, if those things are unchanged. Not sure about how much of the Low-Framerate problems are Hardware and how much is software (its an Highspeed-Camera and -Sensor after all....) but if you start selling a camera and put all the stuff you wrote in the datasheet, be sure someone buys it and gets way disapointed, expecting it to do 25 or 24fps just fine and maybe even want to use it as Main Cam for whatever usual filmmaking. Especially if you put stuff like 10Bit and 4096x3073px (Wondering what such a sensor could do with some propper anamorphic glass...
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No matter how that turns out, would still love to have one, even if it was just some Fixed mount Camera, with 2.1 features and software, but this sensor and Memory (allready afraid of the kind of Hard-Drive Space a camera would eat up with 128GB of RAM...). But propably wont happen anytime soon, just got an 2.1 myself, so unless i get one of those as a gift....
