Why don't video projectors have cable inputs?

[Tofer]

Actually, I'm not sure all of them don't, but the ~$1k ones (inFocus, etc.) don't have cable input (at least the ones I'm familiar with). I guess they would need to beef up the speakers on them, too, but it would be cool to have an infocus projector that was plug/play with your cable setup (and had an audio-out capability, too, to hook up normal speakers!). Granted, it isn't too hard to plug into a VCR/DVD player and then output it to an inFocus, but I still think it seems like one more unneeded step.

-Tofer