I also think that noticeable ang difference between a 720p and the Blu-Ray source, especially in terms of color. But if the question is whether "enough" or not for a 42 inch TV...enough, maski 50 enough. Masayang-masaya lang na nakikita kong umiilaw yung blue indication ng HD-audiostream sa AVR and that my media player actually plays like a real Blu-Ray player...hehehe
Kapag 3D, kitang-kita ang difference sa subs.
Sabi ng Wife ko, pinakamalaking difference daw with the Blu-Ray source is if it's a Blu-Ray concert (other than the blue indication on the AVR). Other PDVD friends told me the same thing about concerts. The past 3 nights, I watched the old 80s Beverly Hills 1-3 Blurays all with DTS-HDMA with lots of 80s funky songs, and ang ganda nga ng tunog - that is, ang daming nuance na tunog sa mga surround speakers - and Eddie Murphy was exceptionally hilarious during those times. hehehe