No
A DVD player cannot play a BluRay disc. A BluRay player can play both BluRay discs and DVDs.
No. DVD quality will be displayed whether the player is a DVD player or a Bluray player. DVDs won't be the same quality as a Bluray disc of course.
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.
No. All current 3D disc content is HD and so use Bluray discs. You have to have a 3D Bluray player.
Yes, A DVD player has the capacity to show a VCD disc. However, a VCD player cannot show a DVD disc.
HD DVD and Bluray were competing high definition disc formats. In 2009 HD DVD was withdrawn from sale as it became apparent that Bluray had won the HD disc battle. The two formats are not compatible so HD DVDs can only be played on an HD DVD player.
Beacaus bluray is newer and they think everybody has a bluray player... eventually it will come on dvd.
yes, but you wont get high definition quality
The introduction of high definition discs saw two formats launched. Bluray is one and HD DVD was the other. The format war was won by the Bluray system and HD DVD was withdrawn in 2009. Both Bluray and HD DVD are high definition players but note that "HD DVD" is the name of the format and is confusingly close to the generic description of high definition disc players. Bluray and HD DVD are not compatible so a disc of one type will not play on the other format. There are a handful of dual format disc players but they were expensive and few were sold. If you have HD DVD discs then you need to hand on to an HD DVD player if you want to watch them. All high definition discs on sale now are Bluray and of course will need a Bluray player to play them.
In your home on DVD, BluRay or OnDemand
To play a high definition DVD, you need a high definition DVD player. There are two types available currently. HD DVD, developed by Toshiba is one and BluRay, developed by Sony is the other. They are not compatible, so an HD DVD will not play on a BluRay player and a BluRay disc will not play on an HD DVD player. BluRay looks like it is the winner in the format war between the two companies over the last years so it is likely that Toshiba's format will disappear in the coming months. Note that HD DVD can refer to the Toshiba format but it can also refer to high definition DVDs in general.