In all sincerity, do you have a link to a good one?"Laser light shows haven't changed since the 70's" okay maybe not a direct quote..
But you haven't been watching the right laser shows then if that's the case.
Disney's laser-drawings have the same jitter as the old 70s ones.
(Now, lasers, when they're not trying to draw something can add great effects (sparkles, simulated blasters in the Star Wars show, e.g.).)