I scan, but I've also owned a Diapod (http://www.diapod.com/) at one point, which is a tiny little 35mm slide projector. It was OK, but a dedicated slide projector and screen is going to be a great deal better.

I've thought for a while now that a well put together slide show, despite the mocking it may get, might be a much nicer way to show photos than the "huddle round the iPad" situation many people have.