Well, actually 2K is 2048x1152 but that's a difference hardly worth getting excited about and it is doubtful that it will be the next home format, since the difference would be practically unnoticeable, so there would be no good reason to make a whole new format for it.

I just read somewhere that there are currently some 4K TVs being introduced to the market and 4K capable Blu-Ray players should be introduced soon. When that becomes standard, the prequels are screwed and in the current state of things, so are the OT SEs (and so is Avatar for that matter).