[mythtv-users] OT: Why 1080p?

[Dean Wilson]

I've seen a lot of posts by users wanting to set up 1080p -- which
cards to use, whether to use dual DVI, etc.  All of which makes me
wonder: to my knowledge, HDTV signals are only broadcast in 720p and
1080i.  If that's the case, will having your TV set to 1080p make any
difference?  I would think that you wouldn't see any difference in
picture quality, since (to my knowledge) the highest signal you can
currently get -- HDTV -- is of lesser quality anyway.

Playing the devil's advocate, I can think of the following reasons
people may want 1080p at this time:  (Will those of you who are
setting up 1080p fill me in as to which is correct, or if I'm missing
something?)

1) 1080p does look better, even with a lower resolutions like 1080i or 720p?
2) I'm mistaken about what HDTV signals are broadcast, and 1080p is an
option for some channels?
3) 1080p will eventually be a broadcast standard for HDTV?
4) People use their mythtv boxes for non-HDTV uses?
4.a)  Viewing the upcoming HD-DVD or Blueray DVDs?  (anyone know what
resolution those will commonly be in?)

Just curious why the 1080p hubub...

Thanks,
~Dean