Hi,
it is as far i understand there is also "game tech" used (direct x12 and nvidia things) under the hood, and it can deal with amazing huge scenes in real time, classic apps or render exports like c4d or 3dsmax itself would be never capable of handling this that fast. so it is quite more than just adding gpu rendering, but a complete new architecture under the hood to manage the geometry in real time.
there for an extra application. i use it and it is pretty amazing, it is real time with bruteforce (=pathtracing) and light cache (like coronas UHD), so very good quality, using very intelligent denoisers to manage that in real time, you can even mix nvidia and intel denoiser in its settings.
also the interface is now becoming real nice and useful, more like the modern engines like d5 etc, but will full cosmos, chaos scatter etc support and direct connection (to vray for now).
i very much hope corona 12 adds support, (otherwise i probably would've to switch back to vray)
for me it makes me happy, as I see chaos is here top notch again on newest tech and I not have the feel I need to switch to unreal or other new real time tech out there.