We've known this was going to happen all along, but now we have final confirmation.
Fallout 3 will be made for both Windows PCs and Next Generation Consoles. The website for ZeniMax Media, Inc., the parent company of Bethesda Softworks, has been updated to show Fallout 3 as one of their products. Directly below the image states:
On PC and next
Remember, though, you still have 29 more days. Reserve your judgement until we see what they've got.
Thanks for the tip LoneGunman.