I guess they develop new stuff, such as maybe a Next gen Chrons with an UHD/4k Resolution Sensor, as Shown Possible bevore in the Demo Reel for the 2.1 Chronos.
Also Marketing, Actually Manufacturing The new 2.1 ones and Bug-Fixing for the existing System as A whole.
Last time, when nobody at Krontech Posted anything for a While, soon after the 2.1 Chronos came out. So Maybe its a good thing then