If I remember correctly, those were dev kits.

AMD are in terrible shape financially, I wouldn't be surprised if the reason PS4/XB1 are mostly using AMD stuff is because AMD agreed to sell them at a much much lower profit.

The funny thing is, they used a more powerful GPU than installed in XBone.

So, you may say, some games previewed on E3 may look worse on the console afterwards.

While it's certainly funny, I'm not surprised really. If I recall well, they did the same thing with Xbox360.

Shows how ready the Xbone was at that point and also the confidence in the product. Hey, the GTX 780s they used rock! :)

The only confirmations I've seen said it was on a PC. I wouldn't mind seeing a link if you have something that says otherwise.

Considering nearly all games they demo are on PCs, regardless of the platform, this topic is rather moot ... . Most devs wouldn't risk dragging their dev kit to a show just to demo a game - a PC is cheap and replaceable and they can run the last build on it and make tweaks immediately.

Basically: this has been done for many many years so why focus on the Xbox One? All this negativity reeks of bandwagon jumping. (just like with Windows 8, to be honest).

It's still not really worth all the fuss:

Games released for a brand new console, won't use its hardware properly because the hardware is too new and unknown - this is and has always been the case. It's not about the power of the Xbox One, it's about how well dev studios can use it. If this was not the case and the PS4/Xbox One games required more power than PCs today were capable of, they wouldn't use PCs in the first place.

Plus, the PC is a well known entity and they can go for the setup that gives the most performance and stability for a live show while the hardware for the consoles may still be tweaked and the software balanced. If the Nvidia drivers on Windows 7 perform the best, they'll use exactly that (and who knows, Nvidia may have been more willing to create custom drivers than ATI).

So ... not worth all the fuss. The Xbox 360's first games looked just as good on PC as well so why would this be a surprise?

I think people are just teasing MS a bit, no one is seriously pissed off. This same shit happens at every press event ever. It's just funny when it's made obvious, and funnier when it's Windows 7.

And yeah, I would guess a relatively decent gaming PC will match these consoles at launch, if developers optimize. The RAM is the only thing that looks high-end to me, but half of it will be used by the system features and when you combine VRAM and normal RAM in a PC it's very competitive.

Nothing new under the sun, etc.

YYeah, it's not like they have some contracts between AMD and Microsoft to offer support.

Yes, all those games are developed on PCs, and I'm fairly sure they're not yet ready to be deployed on console as they're not finished. It makes quite a bit of sense, really.

To display them on a competitor's GPU?

Its funny sure, but old. Those games are in development so they run (if you are lucky) on dev-kits.
Once i saw how hard it was for a magazine to test a game.

I think it is at least good news that the XBoxOne games could apparently run ok also on NVidia hardware, and in Windows 7. So porting them to run on PCs should be easy.