It would not surprise me. They are already going into Android phones. And the Intel Phone chip benchmarks are shown to blow away the best ARMH based chips. Android phones have about a 20% greater market share than Apple too. Apple is certainly watching, concerned, and interested.
Ok .. i may be trading on luck .. but i am not technically stupid ... Intel will never beat ARM ..or invade mobile devices .... Have you seem the power foot print of ARM and roadmap they have... period.