@VikashMehta: You just do a schema compare in VS using the DB as the source and your project as the target. Once it is done you write the changes. This will checkout only the files that are now different. I do it all the time.
@mrjimmy: I think what Miguel was trying to show was you no longer have to go to a Mac to run the application. We now have an iOS emulator on Windows which we never had before. But I can see how it could have been confusing.