1+ for online sync. Keeping your data available everywhere is one of the biggest things most of us like about webapps. Evernote is a great example of desktop

1+ for online sync. Keeping your data available everywhere is one of the biggest things most of us like about webapps. Evernote is a great example of desktop + mobile + web syncing synergy. Of course, this depends on what your app is doing. Every useful app doesn't have to sync, or even create data that you'd want to sync. That said, most apps could greatly benefit from syncing, no matter what platform they're on.