4k TV's now are half the price HD TV's were back in 2006. They're affordable for most and dropping in price quickly, the main obstacle is having enough room to get the benefit from it, the sofa in my living room is about 4 meters away from my TV. Buying a TV too small you wouldn't be able to tell the difference, buying a TV too large would either look stupid or just not fit.
Again in my Bedroom, I sit about 2.5 meters away from the TV, I could fit a 42 inch in their but I doubt at that distance and size there's much of a difference...








