Best CPU/Graphics for gaming on tablets/phones?

[Red Hawk]

The recent announcement of Deus Ex: The Fall has me considering eventually getting an Android phone or tablet with a relatively good CPU and graphics chip for gaming. My current Samsung Galaxy S Relay has a 1.5 GHz Qualcomm Krait CPU that's just fine and dandy, but its 400 MHz Adreno 225 graphics chip leaves quite a bit to be desired.

The options, as I see them, are this:

AMD's Kabini or Temash (only in tablets, obviously)
Intel's Silvermont
Nvidia's Tegra 4
Qualcomm's Krait with Adreno 320 series graphics

How should these platforms compare? And are there any contenders I'm leaving out?

 

[24601]

I'm guessing the HD4600 will be, unless they work magic and get the HD5000 down to 7w.

 

[cmdrdredd]

On paper from what I've seen so far Tegra 4 looks to be the most promising for games. The Nvidia Shield is not too bad looking of a solution, but for one game I dont think I could pay that kind of pricing. Not knowing or expecting big releases on Android consistently is a deterrant for me.

When phones or tablets start coming out using Tegra 4 and the next round of mobile CPUs then I think it will be easier to make a comparison.