The same games in overlapping gens that are most of the Wii Us critically acclaimed library.
and you can say the same for many consoles... the amount of HD Remasters on the PS360 was crazy, almost every big name game was brought back as a remaster... we are talking Ratchet & Clank, Jak, Killzone 1, SplinterCell 1-3, Ninja Gaiden, GTA San Andreas, Sly Cooper, Halo, Fable, Beyond Good & Evil, Resident Evil 4, MGS2+3, God of War 1+2 and so on and so forth.
and it's not like these ports we see on Switch are actually that much better if at all better than the Wii U versions... in fact, Wonderful 101 is still best played on Wii U... that Splitscreen shit you have to do on the new consoles is a joke... I tried playing like that back on the Wii U when I wanted to play it off-TV and it sucked as much back then as it does now.
Bayonetta 2 runs marginally smoother on Switch... wow!
the only real upgraded versions we've seen so far were maybe Mario kart 8 Deluxe and Mario 3D World... maybe... I mean that's it really. I can't think of one that's actually improved to the point of me wanting it on Switch instead of playing the Wii U version. While what you saw with all those PS360 remaster games, you actually got a way better experience usually! higher resolution, better framerate, better textures, faster loading etc. so not only have you bought maybe a console in order to play these, now these versions are obsolete because the newer ones are just way better