I finally got the HDTV & set it up. Currently
I only have the component cables. The Sharp
didn't include an HDMI cable even. So far
it looks like it's defaulting to 420p.

However, I have a Tivo chained in via RCA
jacks so it's upscaling from a lower format.
I'll have to setup a direct connection via
hdmi/dvi to see the display from cable box to outlaw directly. Need to order the cables
next.