On its own, the release of a high-resolution texture pack for the PC version of Dragon Age 2
wouldn't be that weird. It would just be nice for those PC owners with the gear to handle it. But this pack isn't being released years after the fact, when graphical display technology has improved and made the game look dated -- it's being released now, on the same day as the game.
In order to take advantage of the new textures, you need at least 1 gigabyte of video RAM, and BioWare recommends DirectX 11. You also need over a gig of spare hard drive space. You should probably clean your glasses, too, for the absolute highest visual fidelity.