Well it seems to be happening. I am noticing more and more mention of mpeg noise reduction by different manufacturers.

DVDO is releasing a new unit (vp50 pro) now Toshiba has filtering embedded in a TV: http://www.soundandvisionmag.com/article.asp?section_id=59&article_id=2474&page_number=1&print_page=y

Interesting,
Bob