It would be an interesting idea to them if they have an Android phone and I wouldn't have the time to code for two platforms otherwise.
I get that there is a tradeoff involved, but the Mono-x products are in an interesting space. They aren't webviews (like PhoneGap), they aren't a weird JS hybrid (like Titanium)- they're full native experiences. You'll get some newly released features later (I imagine), but the user experience really shouldn't be affected that much.
Never forget about the users.