If you pick up Battlefield 3 for Xbox 360 or PlayStation 3 later this month, you'll have the option of installing a set of higher resolution textures, too, Electronic Arts confirmed this afternoon.
It's optional on both platforms.
EA didn't have additional details on the texture pack, and we may have to wait until the game's released to find out whether there's a substantial difference if you choose not (or in the case of some Xbox 360 machines, cannot) to install the add-on.