And don't forget the need to pee during a 4 hour movie that the disc change over allows for.
With almost 3,500 DVDs on my shelves I won't be exactly rushing to upgrade my entire collection. I had a bit of "upgradeitis" when I first got my HD player and bought about a dozen or so titles I already had on SD, and while the difference was noticeable it wasn't
that big a leap, so the novelty soon waned. I'm playing standard DVDs on an £800 DVD player and the A/V quality is still pretty tasty.
I buy new releases that I want on HD as they appear and will dip again on the odd title like the upcoming
Blade Runner and
2001 releases (which if there weren't HD versions I'd still upgrade to even on SD for the new material) , but overall I won't be double dipping. The quality of SD is good enough and I'd sooner spend the money on new HD discs or new equipment.
To be frank if HD didn't take off I wouldn't lose any sleep. I still see standard DVDs where the A/V quality makes me go "Wow!"