The basic gist is that Rockstar's Dundee studio has a remastered collection of the GTA series' PS2 trilogy (GTA3, Vice City, and San Andreas) in the works for multiple platforms, with one of them being the Switch, making this the first time a Nintendo console has gotten these mainline GTA games. The rumor suggests the collection has the games remastered in the Unreal Engine with the visuals being a mix of both old and new, with one supposed insider comparing what they saw to resembling the PC versions of these games after using graphics enhancement mods.
If true then I really want to see what these are supposed to look like, and both how faithful and how updated they're gonna be compared to the originals. For one I'm hoping GTA3 and Vice City have a more modern control scheme (and use an aiming system closer to what San Andreas already uses), that alone will make some missions that were annoyingly hard on PS2 much more manageable (the PC ports of GTA3 and VC have free aiming, and it certainly makes a big difference in certain missions). Proper widescreen support would also be good, as not even the PC versions of GTA3 and VC have good widescreen. I'd love it if the old soundtracks make a return but I admit I won't hold my breath (the PC versions of VC and SA on Steam have actually had songs patched OUT of them due to expired licenses, with notable musicians and bands like Michael Jackson, Ozzie Osbourne, 2Pac, NWA, and more no longer being in the Steam versions of the games).