This video is quite interesting showing the difference between the different generations of playstation console. The racing game looks the biggest improvement on ps4. As with all games not all games push the hardware. The PS4 clearly is making a technical leap but its not the same size leap as ps2 to ps3 or ps1 to ps2 and this is to be expected as the ps4 hardware has been realistically choosen to meet a price point.
This is a great page for comparing the spec's of wii u, ps4 and xbox one. The poster keeps it upto date and seems the best reference point currently unless you want to trawl through all the neogaf postings etc.
http://gamrconnect.v...d.php?id=136756
CPU wise the xbox one and ps4 are at about 38,400 dmips for their cpu which compares to about 9,000 dmips or just under for wii u. The xenon is about 19,200 dmips and ps3 in theory is about the same as wii u for ppe but upto about 30,000 for the cell in total. Floating point performance of the xenon and cell is far in excess of the wii u cpu but the wii u gpu makes up for it. The PS4 and xbox one offload a lot of work to their gpu's same as wii u.
End summary is 360, PS3 and wii u are comparable in performance approximately. Xbox one is probably 3-4x as powerful as those, ps4 is about 1.5x xbox one overall.
You are still, regardless of everything that has been said, using the ridiculous notion that the Wii U CPU is a pure PPC750 core (x3, it don't need no stinkin SMP). The numbers you ripped from GAF don't take into account the fact the the architecture is brand new and not Broadwayx3, they are still operating on that notion simply because they have no clue about it, and no one has actually run Dhrystone on the thing and talked about it.
Using these numbers is disingenuous at best, as they are ALL speculative. Not just some of them, ALL of them.