Well if acurate

Very powerful and very PC like achitecture, combined with customised version of MS's DX11 APIs should allow for easy development and allow devs to easily bring over the fully featured high end versions of the engines used in modern PC games. Launch titles would likely look like current high end PC games without much effort. with all the bells and whistles (tessellation, GPU accelerated physics, computer based lighting implementations etc)  that was shown in the "next gen" tech demos if it a bit scaled back in fidality and resolution.

But isn't those specs just for the dev kits? And aren't dev kits much more powerful than the retail version?? So maybe we can cut those specs in half (where possible)?

no not really these are still very early kits that are subject to change, very early dev kits can often lack features that will be in final hardware as final hardware is often bassed on hardware that doesn't fully exist yet. For example early X360 kits used older generation GPUs that lacked the unified shader architecture and eDRAM of the final hardware. 

One area that dev kits often end up higher spec than final hardware is RAM as dev kits use extra RAM for debugging. But as the dev kits aparently have more than 8GB/12GB of RAM cutting that down to around 6GB isn't a huge loss as that is still a huge amount of RAM. 

What this would tell us is that the final hardware will target performance compairable to a GTX570 and a likely very low clocked 8 core Sandy Bridge bassed/8 core AMD FX CPU with a lot of RAM. Which would be a very powerful system. 

It is possible that these rumours are total fabrication or final hardware will fail to meet the target specs of course. The PS3 did both with dev kits being underclocked (Cell at 2.4GHz vs final 3.2GHz) and final hardware missing targets (according to Kojima anyway).

Damn, so this could be a true beast?? x3ox >>>>>>>PS4>WiiU more or less? :P

Could be or it could not hard to tell at this point. But this rumour suggests it will be high end to say the least. 

I don't see Sony being far behind tho, I mean they have said they "won't show PS4 until it demonstrates a significant leap" and they have always been a company that prides it's self on being cutting edge. Without Ken there I don't think they will shoot for the stars and throw in the kitchen sink like the PS3 but I don't see them not going for a powerful peice of hardware. Not with Kaz in the top position, and they will probably launch last as well, depends on what the Yen does tho.

I've never had any doubts that x3ox would be top dog next gen, so no surprise there. But I'm not too sure how the PS4 will fare... They didn't use cutting edge technology for the PS1-2 (well, except the fact that they used disc's for PS1 and DVD for PS2 :p), so PS3 ir a trend breaker in that regard... But yeah, it all depends on the yen how much of a beast it'll be!!

Aren't Sandy Bridge-E CPUs 6 core rather than 8 core?

And replacing it for an 8 core FX processor which uses more power, runs hotter and gives less performance even with 2 more cores... it is a bit odd. Sure, it's cheaper, but it's still odd.

About the GPU, a Nvidia GTX570 gives about the same performance of an AMD HD7870, which will be on par with an HD8770 Sea islands GPU?

I don't know what to think. Yes, it looks very powerful, but also quite expensive.

It's probably 4core/8thread SB CPU (though it might be EP variant with 8 physical cores). As for 8-core FX CPUs, there are versions with 95W TDP, so that seems plausible - guess we'll finally see well optimized 8-core code after all ;). And GPU performance does seem to be in line with for a long time rumoured 78xx performance...

So we may be seeing sea islands in Orbis and Durango? Awesome.

As far as I know, the lowest 8 core FX chip is the FX-8120 and is rated at 125W.

Anyway, the difference in between those CPU is brutal, that's the strange thing. Going from a weak one to a stronger one is understable and doesn't affect the development of the games, but the other way around is strange. Also both CPUs use a different architecture, making this change more strange.

Just look at this comparison between the lowest spec'ed 4 core Sandy Bridge-E i7-3820 and the best of the FX chips, the 8 core FX-8350. The intel chip destroys the AMD one (sadly). And then add that the i7-3820 uses 160W at load while the FX-8350 uses 195W (the numbers are for the whole system).

As I said, it's a bit odd.