It's mostly about the synchronisation. For my use-case, I read articles in Google Reader during my lunch break at work. When I'm browsing at home later, on my o

It's mostly about the synchronisation. For my use-case, I read articles in Google Reader during my lunch break at work. When I'm browsing at home later, on my own PC or iPad I don't want to have to wade through dozens of articles I've already read to find the new stuff. I guess there's also the convenience of access to the web app pretty much anywhere, but that's secondary (to me).