Creating a vector display with a laser
You want a set of "galvanometer scanners" plus driver amps, which are standard laser show technology. 

The good ones are by Cambridge Technologies, and you will wince at the price, (CT6210 and the like), but there are cheap knockoffs from the usual suspects that are good enough to play with (The DT40s are generally accepted to be a reasonable set of cheap scanners).   

Drive signals are +-10V differential analogue, and you will need to slew rate limit (and/or interpolate points) to produce something the scanners can keep up with (Small scan angles make for more points per second). 

The MAME arcade machine emulator has been a popular target for hacking to drive laser scanners, so this has been done. 

Do be careful, it does not take much laser to trash a retina, and you only come with two.

Regards, Dan.