Just take a difference - "wants keep" vs "can keep". Intel can keep WP7 because it has a full infrastructure of relationship with M$, a lot of ready decisions "how to do" for Windows etc. For Intel it would be a simple and non-expensive to switch Nokia's/M$ WP7 developers to Intel-based CPU from ARM.

(The competitiveness of Intel CPUs is another issue but it is inside Intel and should be solved in any way... if Intel wants mobile market)

Does Intel want? I don't know.