OK, for my next trick you're going to need a high-end PC... does anyone remember "The System 16 Arcade Emulator"? It was one of the first arcade emulators I ever used, together with Callus and DOS versions of MAME.
I requires a P133 CPU, an S3 Virge (it crashes with lesser videocards, don't know why) and to set your PCem window as "resizable".
As for what it does, it emulates certain SEGA arcade titles, such as "E.SWAT", "Shinobi" or "Golden Axe". Back in the days, it didn't get any much cooler than this. Personally, I never could get enough of "Out Run".
This should also run under DOSBox, but the last time I tried it ran way too fast. My guess is that it relies on VSYNC to calculate the right speed on faster systems.