Our new Business edition, at $999, now includes iOS support for Visual Studio developers.
I guess you will be able to use a device from Windows, or something like that. Otherwise it won't make sense to provide iOS support for VS.
Correction - you will need a Mac for the final build of the product. VS will connect through network to this Mac ... Not sure if it makes more sense to just use VS as a glorified C# editor. I suppose if you are a hard core VS user it will be easier to do your development from VS.