Hi Mikey,
Short answer...Nope, they will not work in a standard DVD player.
Remember the BetaMax / VHS wars way back when.
Well there is a new war brewing between the giant companies.
Blu Ray is battling against HD DVD. Both are high definition formats.
It is as far a jump in technology over DVD was over VHS and CD was over cassettes.
The capacity of a dual layered Blu-Ray disc is, for now at least, 50GB with 200 GB in the near future. The capacity of a dual layered HD DVD disc is 30GB
Sorry for the returns in your future.
So far there is no clear winner on the horizon so companies like LG are making combo players for both formats but they are still expensive.
Tim