Now, we're back to centralized systems- and I couldn't believe it when I watched the shift: What first caught my attention that this could get serious was gmail. Then g-office (whatever they called it then). Meanwhile a whole host of other services started.
I was developing a desktop app because I still wasn't convinced that people wouldn't prefer having their software and data "in hand," as it were.
I expect a new advantage will emerge and we'll want our machines and data back.