> If we could solve this problem, we could go a long way towards some level of decentralisation

I've heard variations of this batted around recently. Specifically, if we could allow web apps out of the sandbox so they could work like native apps, or have more access to the file system, we could maybe work our way out of the walled gardens and into totally distributed storage / processing / hosting. And it's true, it's just that...

> On the other hand, which is more secure? Your service or the user's machine.

This.