I have had a few similar monitors.
Mitsubishi Diamondscan 20m
Mitsubishi Megaview 3717C
Mitsubishi AM-3501R
All are excellent monitors. The Megaview and AM-3501R are humongous, and weigh a ton, but are excellent for MAME. Classic computing should be fine too, but I wouldn't try anything over a 640x480 resolution. The specs claim it can do higher, but in my experience the higher resolutions don't look right, or are dim. Because of the coarse dot pitch of the screen the high resolutions don't make much of a difference anyway.
If you search the monitors forum for "presentation monitor" you will find many threads on the subject.