Konami has detailed the framerate and resolution for Metal Gear Solid: Master Collection Vol. 1 on the various platforms the game will release for. MGS1 will run at 30FPS on all platforms, in 1080p resolution with the exception of Switch handheld mode, which will output the game at 720p. MGS2 and MGS3 will run at 60FPS on all platforms except for Switch, and run at 1080p resolution, again with the exception of Switch handheld mode.
The game is releasing next month, on October 24th. Aside from the three titles mentioned above, the bundle will come with various extras. Check out this page for more information.
Source: Metal Gear Official website