I believe this will mostly affects games which were lacking in technology.
I'd personally LOVE to see The Sims 1 or The Sims 2 re-released with performance and resolution upgrades, and, most importantly, made to be open world. Since they're older, I believe they could very easily render the entire map like The Sims 3, but with the charm of TS1 or TS2.
I cannot think of other games, since most games I see as adequate, whereas TS1 and TS2 were bound by system performance during their respective times.
TES: Morrowind, Fallout: New Vegas, RDR 1
EDIT: Guys, OP is talking about proper remaster. I'd actually like a current gen remakes.
You mean like OpenMW or a full remake?
Played OpenMW with a bunch of mods, including TES3MP multiplayer mod and played through the game with a couple of friends. Truly incredible experience!
OpenMW is making a Free Software Morrowind engine and Skywind is remastering Morrowind on the Skyrim engine, but what I want is remastered Morrowind on a Free Software Skyrim engine.
I can't upvote FNV enough. I would LOVE a modern version, especially if they could incorporate some of the mods that add new areas and questlines.
We kinda have a FNV remaster. But it requires 3-4 hours of setup minimum, a nexusmods premium account, and luck that nothing breaks…