Games unfortunately aren't the same as other mediums - take an old movie (after the advent of sound, anyway) and, though the direction may seem a bit dated and the acting and accents could be a bit stagey, the plot and pacing will have the exact same effect on you that they would have had on cinemagoers in 1930. Read an old book today and, barring the occasional bit of archaic language, your response will theoretically be the same as that of people at the time.
But playing, say, Wasteland in 2024 is not the same as playing it in 1988. The interface, the visuals, the very core principles of its design are all dated in a way that the plot of a movie or the melody of a song can never date. The other thing is that oftentimes, videogames are trying and failing to do something that later games will accomplish better. Most people don't really care about the likes of Catacomb 3-D when Doom blows it out of the water in literally every way (yes, I know you can backtrack to previous maps on Catacomb, no I don't think this gives it a leg-up over Doom).
Future generations will probably do what most people do with other mediums, and select a few games that are both of historical note and remain generally accessible and easy to play to this day. Stuff like Doom, Diablo, Mario 64, Half-Life, maybe Fallout. This is obviously a shame because a huge amount of good shit will be lost, but if all goes well, future generations will be enjoying so many quality releases in their own time that they won't need to go salvaging shit from the 90s and 2000s.
Kind of a tangent but I also wonder if AI integration will eventually become such a big thing in games that future generations can cleanly divide videogames into pre-AI and post-AI, a bit like the silent/sound divide for films. It'll probably look absolutely hilarious to future people that you had to pick from three dialogue options in Fallout, or that enemies in FPS games could ever lose track of the player or get stuck on walls.