I think the worst thing about projectors is their noise. I heard lasers are a bit better here, but I only saw a model that was as noisy as the others, while the image wasn't that much or even at all better. That was in the quality segment that use DLP for image modulation. Did this improve in recent years?
Hmm, can't say I've been bothered by noise on any projector. Primarily because the audio system or headphones drown it out. Cooling design hasn't changed much from what I've seen but newer projectors are quieter.
