ARM may be the architecture that dominates the tablet PC world. Digitimes reports that a number of major vendors are skeptical about the future of Atom in the tablet realm. Most of these retailers are choosing to focus on ARM for the slate market. They will engage in some limited adoption of Atom tablets in order to maintain their relationship with Intel.
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This does not bode well for the company's plans for the future. ARM processors draw less power and dissipate heat better, as well as being cheaper, than their Atom cousins. In a market where efficiency is everything, this could spell doom for the future of Atom in the mobile computing market. Netbooks have gotten as large as they are likely to get; slates like the iPad are the new emerging market.
Of course, this game is far from over. Intel's Oak Trail platform draws 50% less power than the previous generation of Atom chips. In time, Atom could come to be as efficient, if not moreso, than anything AMD will bring to bear. For now though, the safe money is not on Intel.