Without DVD support, buying a Windows 8 upgrade or install disc wouldn't work... The entire "theory" contradicts itself. Now obviously Windows 8 Tablets won't have DVD drives included, but that doesn't mean the tablets won't support USB DVD Drives.
Windows 8 is still Windows 7 when you switch to desktop mode. The Metro Interface is mainly intended for tablets and compared to other tablet OS's, Metro is definitely the best. Anyways, stop falling for everything the Microsoft haters are telling you. They're all just lies that don't even make sense from the beginning. I don't get how you even fell for the "no support for DVD's" theory.
I think you misunderstood the situation. Windows 8 will not ship with the ability to play DVD Video. No one has claimed the are removing support for DVD formats - only the ability to watch movies with Media Player.
No big loss in my opinion, I use Nero for all my DVD Playback, and am stuck with 3 different BR packages to watch movies.