To that end, I think we are witnessing something I (and others) saw coming several years ago: The bottoming of TV prices, more or less permanently. You can't really sell more TVs, so why sell them for any less money? (Please note: That doesn't mean prices won't get any lower at all, just figure "not much lower".
Now, of course, OLED prices will get a lot lower, to compete with LCDs. But the question one has to ask is, "Which LCDs?" The segment of the market that is $1200 4K LCDs is one that OLED is not likely to be in for years... many, many years. Display technology rarely moves in a discontinuous way so the odds are this won't change, either.
There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.
But those 4k LCD's are not very good. I'm fine with my Panasonic plasma as a TV but I cannot stand the poor blacks of an IPS. OLED is the only alternative really for monitors.
It all may depend on how well the masses flock to 4K. People weren't impressed with 3D. If they aren't that impressed with 4K, there will be more pressure to get OLED to market. If 4K is the next big think, it might slow OLED adoption down.
Personally, I can't wait for the death of LCD for Home Theater.