I will wait for a while
The things I am waiting for.
'Flat' OLED displays to become affordable and for them to work out the kinks (Like uniformity, endurance and lag). Samsung are reported to be getting back into the race. I personally was hoping that Panasonic would get into OLED. Even if they use LG's panels. No sign yet though.
HDR and high bit depth displays (I think one guy on the Value Electronic HDTV shootout said that displays need to go to 16bit or even higher to make full use of HDR.
HDMI 2.2 or newer on ALL ports (Same for video cards).
I'll mention lag again because it is very important for gaming. Currently LG's OLED TV's have *HUGE* input lag due to the processing.
Better smooth motion algorithms (I still see ghosting around moving objects if you set it too strong. Also full 1080P/4K pixel motion resolution only seems to come when you enable interpolation even at it's lowest settings).
Support for high refresh rates. 4K needs 120/144Hz.
CONTENT! CONTENT! CONTENT!
Oh and The Hobbit at 48FPS? NEVER!!! Basically the BluRay alliance did not put it in their spec.
There are too many compromises for me right now. Personally I am waiting for that operaiton to become common that puts new lenses in my eyes (giving you super human clear vision apparently) that was recently reported on so I can get rid of my thick spectacles to actually appreciate any of this.