No. Optical storage uses lasers to "see" the media (e.g. CD, DVD, HD-DVD and BluRay)
CD and DVD storage technologies are typically classified as computer data storage. They can also be referred to as external storage.
An optical storage medium such as a CD or DVD can store audio and video files, respectively. DVD's are also capable of storing images and other data.
Beacaus bluray is newer and they think everybody has a bluray player... eventually it will come on dvd.
optical disls
DVD players cannot play Bluray discs. The lasers and the data storage are different so no data can be read from a Bluray disc in a DVD drive. That is the case whether or not there is any up-scaling available in the player. Bluray players on the other hand are quite happy to play DVDs as well as Bluray discs.
Could be nothing more than the Bluray DVD's that you're watching aren't encoded in 5.1 surround.
A DVD player cannot play a BluRay disc. A BluRay player can play both BluRay discs and DVDs.
This is very unlikley, bluray is far ahead of VCR technology, consider converting your vhs tapes to dvd.
Yes, BluRay DVD players also play non Blu-Ray DVDs with no problem.
Blu-ray Double Layered.
A Bluray disc stores five times more data than a DVD. Therefore, a DVD will not have the capacity to store the contents of a Bluray disc.