[beecafe]

You could use holography/beamforming to steer a beam from a DLP, although it would be just a small % of the original power.

[nomel]

I think the beautify of the mirror system is that it's direct, understandable/observable, and nice to look at by itself, even if it's not showing an image. It's elegant. If you use beam formers and DLPs, you're just making an overcomplicated DLP projector that's going to look like an overcomplicated DLP projector.

[beecafe]

Absolutely. And it'll keep working on a sandy beach far from any power source.