There are votes to add soldiers stats on the inventory screen, others want to make the "ground grid" larger, so you need less scrolling when you have a lot of available equipment.
Now I read just stretching the screen and a vote for multiple soldiers on the screen...
It just is an example of how hard it is to make a proper design for a higher resolution game, you can have endless discussions about just one screen, but there are dozens of screens out there. Enlarging the battlefield to show more tiles is peanuts, it's all the screens that is the biggest work.
Unless you keep it simple, as volutar says, only the battlescape map and geoscape globe in a higher resolution, and just stretch everything else.