When I looked up his TV specs, it was noted that the component input did not accept 720p, so using an HDMI-Component converter will only give 480p at best. I'd hate to be living back in the SD world again for all content!
This is what I found on an old post from plasmatvbuyingguide -
Thanks for this forum, it has been very helpful in deciding on a plasma. However, after reading all the questions here, I'm still not clear about the 720p HD format. Does the TH-42PD25U accept (and downsample gracefully) 720p HD format? Panasonic's web site tech specs HDTV compatibility for this model lists 1080i and 480p, but doesn't mention 720p. I read in another question's answer that the consumer division decided not to support 720p, but what happens when a station broadcasts their station in 720p format?
From speaking with a Panasonic technical support representative, the plasmas will convert the 720p signals to 1080i from component or HDMI. It will accept 720p and not convert from the cable card or the VGA inputs. The TH42PD25 is an EDTV and the signal will be downcoverted to 480p.