Bethesda’s Morrowind and Oblivion coming to Steam?

If the above image is anything to go by the guys over at Steam seem to have uploaded said image clearly displaying Bethesda’s Morrowind and Oblivion before they were announced to hit the service.
The ad was displayed on the homepage for a brief period of time before it was taken down. However, you can still view the ad to verify its legitimacy here, which is clearly located on the Steam’s servers.
I think its safe to say that both of these games will in fact be hitting the service at some point in the very near future. I mean, Bethesda’s Fallout 3 is available from Steam, why not some of their back catalog too?
Read (Gamerlimit)
Tags: advertisement, bethesda, digital distribution, fallout 3, Leak, morrowind, Oblivion, steam, valve