On any CRT screen, you'd just get 320x240 as native resolution, the "interpolation" basically done by the phosphorus of the screen. This was the norm well into 90s, and not everybody was on an LCD monitor in 00s, either.
I remember that many games (myself included) resisted LCDs for a long time even beyond that, precisely because they could only do one resolution well. If you played old games, this wasn't satisfactory because those were often hardcoded in the resolutions they support - typically 320x200 or 640x480. And if you played new games, you'd often have to dial the resolution down to get it running reasonably fast.
I remember that many games (myself included) resisted LCDs for a long time even beyond that, precisely because they could only do one resolution well. If you played old games, this wasn't satisfactory because those were often hardcoded in the resolutions they support - typically 320x200 or 640x480. And if you played new games, you'd often have to dial the resolution down to get it running reasonably fast.