Reminds me of Nvidia's Shield going 4k. I think the resolutions are just marketing. Average Joe knows that 1080p is "good" but really doesn't understand why. He just knows that as far as screens it's something you need. It's "HD". That's the only reason why I can see them pushing it out to the phones. That, and probably because it's easier these days with all the hardware already supporting it. I suppose another reason might be that you wouldn't have to convert video files, like movies, to odd smaller resolutions.