<< makes reading text on a 50"+ screen easy. And at 1280x720....drool >>
LOL, have you checked prices on 50"+ screens that can do that kind of resolution?  Costs more than the average new car!  The tax on a screen that good of that size will be several times more than a $100 daughterboard.
At a job I had a few years ago I used a Sun Sparc workstation and a 56" data-grade rear-projection monitor (made by Electrohome, now Christie Digital).  1200 x something resolution, very nice.  But the monitor cost $42,000.  And it was about as big as 2 refrigerators and weighed 800 pounds.  That was some excellent TV-out, though.
BTW, 1080 is the highest HDTV resolution available.
But it would be cool if HDTV-ready sets with VGA inputs were widely available at affordable prices.