I'm running on a V973 V1:

So I've now been running a good half day with this new version and it really is a joy. 

I'm seeing the bootup in seconds. The new quickboot works very well so after a quickboot start it's really impressively quick. 

Screen rotate is roughly within a second, as they promised. It might be a generous second at times. 

Watching the CPU level it's way better. Previously after starting up I had to wait 5 minutes before it would settle . Now I can open apps straight after switching on. 

In half a day I've not seen the dreaded 'wait'. Zinio running well. Google Play fires up immediately. Amazon Apps loads quickly. 

I'm still not seeing HMI working. This may be my cable/connector. But I have cut the cable right back. 

I've also played around with Wifi Direct on my Samsung TV and not seeing that working. 

So my feeling is this is a very good step forwards.