2560x1600 isn't 16:9, it's 16:10. And they don't make 16:10 TVs any more. 2560x1440 (2.5k) is probably not coming on TVs at all, and if they will, they won't be popular. But 4K (3840x2160) are already on the market for insane price and on sizes that are about double than what you are looking for. I can assume that we'll start seeing 4K goes mainstream in about 3 years on TV, and about 1 to 2 years on monitors...