im pretty sure the dvd will fade over time, not alot of people who already have an SDTV are upgrading to an HD one unless they have the extra money for it, and alot of people dont care about HD or SD or even know what it is, i do know though that SDTV's are not even sold new anymore, it's only a matter of time before DVD sales drop enough to stop making them. i remember when the DVD came out it only took like three years before VHS tapes werent made anymore. as far as upconversion goes, i think they look worse when up-scaled. i recently bought a 720p lcd display and sure, they dont look the best on it, but upscaling it makes it seem grainy. it almost reminds me of what VHS looked like on an SDTV compared to DVD, ill upgrade to blu-ray eventually, but not for awhile, ive spent 500 dollars on AV equip in the last few months and its time to lay off for a bit. my receiver also does not support blu-ray audio. i dont plan on uprgrading it anytime soon, not for a year at least.