I think it might be interesting to see what happens with this in the long run. Microsoft says that under the hood it is their technology, but under the hood it is linux & java and Microsoft hasn't gone after that successfully in the market.
Indirectly, if they try to go after Android they might have issues, because they will have to attack only things that are not related to Java and Linux ( custom connectors, some user interface layouts, etc) because linux is now backed by HP, IBM and Dell and all of the IP that those companies carry (this is what derailed Microsoft from going after linux several years ago).
The IP game these days usually doesnt stop products, it just has companies share the wealth. In the end, even if Apple wins, Android will still be in the Market, Apple will just get a tiny piece of the royalties and everyone will win.