About 8 years ago i got a video projector to try it out.  It used lots of power, made lots of heat and noise, consumed expensive bulbs and it wasn't HD... so i sold it for a fair price to a worthy organization (ISEA).

Now we have Pico Projectors that use much less power, don't require bulb replacement and are HD! 

This will be a Solar Powered Conference Center when all the parts fall in place: