Fact is its better and its becoming affordable very fast its definetly worth buying if it gets affordable.
The 55-65 inch Sony 4k TVs are 5000-6000. Thoshiba has 7000 Dollar 4k TVs
Chinese brands offer 4k 50inch for 1500 Dollar already.
In a few years it might be so cheap that that people will be willing to pay a couple of hundred dollars more for 4k TVs if they need a new TV anyway 4k/3D will be standard features for all TVs in 5-10 years.