[danrok]

Rear projection is normally the best way for video projection brightness. That's where the projector is behind a translucent screen. The big draw back is that the projector needs to be some distance behind the screen, so you end up with a lot of dead space.

Quite often front projection screens are just some bright white material, which doesn't throw back so much light at the audience.

A long standing method to improve front projection, is to use a silver screen. That's where the projection screen has tiny particles of silver impregnated in to the surface. Makes it a lot more reflective. But silver is expensive.

The review doesn't say if this is a silver screen, but the price of it indicates that it probably is.

So, it's a modern take on old technology.