Are you sure about that? (I hear they use low-end x86 cores and ARC cores but I haven't heard about ARM. ARC in general is very hackable while ARM is not hackable at all, so those rumors made sense to me.)
A lot of flash media controllers use an arm core, for example. Also, Intel uses ARM's graphics in some of their low power consumption chips [2]. Because ARM chips sip power so well, you find them in some really surprising places.
