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Re:Microsoft Introduces New "Surface" Tablet by Judson on Monday June 18, 2012 @11:39PM (#4130124)
From what I understand, the problem with x68 is the lack of processors that can compete with ARM on battery life, which is one of the most important aspects of a portable device.
Re:Microsoft Introduces New "Surface" Tablet by freehunter on Tuesday June 19, 2012 @08:42AM (#4131457)
Intel has and is shipping x86 SoC processors which can compete (perhaps not beat) with ARM power efficiency. [1]

On the flip side, ARM doesn't scale as well as x86 to higher power outputs.

[1] https://en.wikipedia.org/wiki/Atom_%28system_on_chip%29