Is There That Much A Noticable Difference In A 720p Hdtv Vs. A 1080p?

Depends on how big the screen is and what your sources are. The bigger the screen, the more noticeable. A reasonable cutoff size is about 50″ … bigger, and you’ll notice the 1080p more. Smaller you won’t notice it as much, especially at viewing distance.
If you watch a lot of std. def. broadcasts and/or std. DVDs, the diff. won’t be as great either. If you have 1080p sources like BluRay discs, you’ll see more difference.

1080p is the highest quality tv so I would suggest buying a 1080p over a 720p because the 720p is already out dated
So if you are planning on buying another tv in the next 1-2 years go with the 720p for now.

Yes there’s a great difference.720p is just the SDTV(standard def.).But if you use a suitable media source which gives a full HD(1080) output like blue ray or HD disk and view from the right distance from screen,you will find the difference

Geez, talk about your misinformation. First off, 720p IS HD and is NOT standard definition. Standard definition is 480p.
Secondly, the poster above is correct regarding screen size and most experts say it has to be above 40″ and even that is cutting it close.
Thirdly, NOTHING is broadcast in 1080p, nor will it be any time soon if ever, other than Blu-ray or HD DVD so unless you have one of them you will not see much if any difference in picture quality.
People watching regular TV or Sat on a 1080p are still watching it in 720p or a bogus upscaled 1080p.
weeder