IMO the competitive advantage of Intel in process,with 3D transistors, will be soon matched by TSMC or IBM fab club. So the competition will essentially boil down to power consumption/performance/price. In price Intel can noway match ARM, without seriously hurting their current margins. A mid end notebook cpu from Intel sells for 100-200 $ while a topend ARM CPU from nVidia/Qualcomm sells for like 30 $. Performance of ARM will gradually increase enough to be able to execute most computing tasks and people will have less reasons to pay for an Intel CPU.