As a long time early adopter, I plan to stay away from 4K until their is an abundance of new releases and at least a 2nd generation of hardware. Moreover, as that day approaches, there may be other hardware or software features needed by the projector to get the most of whatever this new 4K software offers. It's not guaranteed that when the new 4K software arrives, the current Sony will be able to play all features (or even all movies).
As one who got caught with a new JVC projector just a month or two prior to the release of the first generation of Blu Ray players, JVC (and their product literature) assured me that my new DILA had a DVI HDCP input. However, the DVI port was on the machine, but no HDCP. Thus my new state of the art G-150 DILA would not play HD DVD and Blu Ray material when they arrived. Thanks to a lot of bitching and Alan Gouger, I got a full refund. Never again will I buy a new piece of hardware before the software makes the market. Things can change.!