Currently there is no 1080p programming, so the only way to get this resolution is from HD DVD or Blu-Ray (or HD video games). But if you're buying for the future, you have to see that 1080p is coming. Resolutions are only going to get better and eventually I think you'll see more programming available - it just may be a while. Unless you plan on buying a new TV in a few years, you may consider the investment now.
Now, if you're considering it, you have to determine if you can even benefit from such a resolution. You're looking at large TVs, but how far are you sitting from it? If you look at my blog on TV sizing (http://ifuhavetoask.blogspot.com/2007/05/size-matters.html), you will see a chart that shows how a 60" TV needs to be viewed from 10' or closer to get a potential benefit from 1080p. Many folks have found this chart to be helpful in determining appropriate screen size and resolution. The blog explains the methodology behind this.
I hope that's helpful
http://HaveToAsk.com (blog on HDTV and more)
I have researched to the ends of the earth and it seems the more research I do the more indecisive I am. I want a plasma 60" or larger. I've been told Pioneer is king, with Panasonic a close second in this size range. Pioneer's 50" 1080p set is too small. They have a 60" 720p set. Panasonic has a 1080p 65" but the picture in the showroom didn't match any of the Pioneers. I'll be watching from 12-15' away. I am not a big moviephile....mostly regular TV and sports in HD. Do I really need a 1080p set...will I hate myself in two years if I get 720p? Is Pioneer coming out with a 1080p set at least 60", and if so, what would expect to pay for it?