Reliable networks of Web services are challenging to implement. Caching such services essentially involves taking snapshots of resources. Instead, why not use WinFS-WinFS synchronization to distribute data to local machines, thus avoiding the speed-of-light constrained latencies associated with web service calls? In such a model, how can distributed security be abstracted out of the application while supporting federated identities? Could the payback from a richer client UI justify a move from from SOA to WinFS sync? Would it be better to write Vista apps that bind to distributed WinFS data than to write web apps?