Waterfall projection screen

I've always thought that it would be cool to landscape a basement.
When building a home, utilize rock formations and natural features of your property by building around them rather than digging them out or blowing them up. With proper lighting and careful watering you could terra-form your basement into a lush jungle, (sans predators) or a flowering, fruit and veggie filled Eden.
I am sure that this much of the idea is already baked but the problem, as I see it, is to incorporate all of the features or a functional rumpus room without spoiling the illusion of a natural setting.
Faux furniture would be relatively easy; couches and chairs that look like boulders or fallen logs but are deceptively comfy to sit on. Even a billiards table could be camouflaged as a fallen tree trunk whose top opens in a roll top desk fashion, but what about the entertainment center?
The stereo system and speakers can easily be hidden but the television poses a bit of a problem if you don't want to have to see it in order to see it, if you know what I mean.
So how a bout a waterfall in the corner of the room which flows like a solid unbroken sheet of glass. If it was backlit it should be possible to project an image on to it, and not ruin the scenery.