99.99% of 20th and 20st century people never needed to have a TV with more than 14 inch viewable area.
You are predicting the transition from 1920 * 1080 to 3840 * 2160 will take longer than that from 640 * 480 (or 720 * 480) to 1920 * 1080.
The reality is it took decades for the first digital 320 * 240 audiovisuals. The time for 320 * 240 to 640 * 480 was much shorter, but it still took more than 10 years. From 640 * 480 or DVD to 1920 * 1080 or HDTV, less than 10 years. Most people on technology websites like myce.com first heard about 3840 * 2160 or uHDTV around 2013. Most others will first hear about it in 2014 or 2015. But Netflix, Sony, YouTube, and many other leading contents providers started supplying uHD video in 2013.
Compared to the first-generation HDTV sets, first-generation uHDTV sets are quite inexpensive. And not just from Sony and Mitsubishi. There are actually tens of uHDTV set manufacturers. Competition's far stronger, at a greatly accelerated pace, and on much larger stakes.
Part of this acceleration is due to media fusion. Apple sells iPod and iPad, but it also sells TVs and watches and monitors and workstations. It will surely soon become an important player in driving as well, with or without drivers. Another factor is that there are now fast-growing mainland Chinese TV manufacturers. Some of them make their own panels. It wasn't a joke when I said "wait... $300" for something that now costs $300,000 on another thread.
Just wait long enough.
Meanwhile, the real ULTRA resolution's not 3840 * 2160. There will be even more 5120 * 2160 and 5120 * 2880 screens for TVs, computers, phones, tablets, cars, refrigerators, or just anything that can accomodate the space and prove its usability.