AFAIK Amazon streams are either 1080i or 720p. Your Panny will do fine w/ such streams. Double check their FAQ here-
This may also help you sort out the differences in resolution-
Can anyone tell me if Amazon 'movies on demand' provides 1080 picture quality and if so, what devices are available that can pass that to my 1080 tv?
My Vierra plasma 1080 tv can access Amazon 'movies on demand', but I dont know if they stream and play at 1080.
I have a Roku on a second tv, but I believe it passes the video at 720.
Any feedback would be greatly appreciated.