Hmm... baka hi-def video on a hard disc based player ang demo nila. Pixellation? Wow, that sounds really bad. Now that you have a much better panel, I'll be looking forward to discussing with you some of the finer points such as motion judder and posterization ...
As to power consumption, OK lang from my experience. I gave my Viera a 100 hour break in period (10 hours a day for 10 days), and power consumption was lower than expected.
As to burn in, I'm confident that the unit will not have this problem under normal usage due to Panasonic's developments in their panels' blue phosphors since their 7th gen panels. However, burn in might still appear with abusive use.
Also, note that the Vieras from Panasonic Philippines are Japan units. Sa States, Mexico made/assembled na; sa Australia, China made/assembled na. Foreign forum members say that the Japan unit has a better picture quality. Does it really make a difference? I don't know. All I can say is that a Japan unit will inspire more confidence on the part of the buyer.