The smartphone market will need to consolidate as it matures. This hasnt been discussed yet on this thread. There are many variants of ARM chips out there. At some point, the non-Apple crowd (e.g., Android, WIN8, Meego, vendors) will need to standardize on some hardware platform. Intel, not ARM, is better suited to supply that standard architecture. -----
It already has standardised, on the A class processors from ARM:)
Seriously, all ARM processors of a specific revision are all compatible regardless of designer or SoC. This is/was FUD spread by Intel regarding the 3 ARM based SoC's that will support the initial launch of Windows 8.
There are "fragmentation" issues, such as Tegra 2 not having the neon SIMD unit and different approaches to booting the SoC via the OS etc.