This seems to me to be the big question right now. Like Apple did with iOS, Microsoft seems to be demanding a rewrite in the Metro mode in order to run on the ARM chips. I think all good tablets will run on ARM as opposed to x86 chips, so what does FileMaker do about it's mobile strategy on Windows? Will there be a seperate product such as Go that runs in Metro, or will the whole of Filemaker Pro get ported to Metro, making it a completely tablet friendly app? I would buy my first MS product in years if I could develop FM databases on a tablet!
[Note that currently Microsoft is saying that Metro apps won't be able to be managed by Windows domains, but I don't expect that huge omission to last long]