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>When the devices are in proximity you literally swipe the icon and are instantly in exactly the same state you left off — on a different device. Web apps don't do it like this, and I think that's an important aspect of the attraction here.

Web applications DO this. Take a look at google docs. Thanks to technologies such as operational transformation, this is possible.

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Chrome doesn't even work like that. Web apps can do it, but it's a huge pain in the ass. It looks like apple's going to make the transition a lot easier.

I am not familiar with any web apps (Google docs included) that put an icon on the lock screen of a device within proximity that you can swipe to be instantly at your editing position ready to continue. This is what I refer to when I say "reducing friction".

It's not the problem with web apps, it's a problem with Apple who doesn't provide such an API. Chrome and Safari has notification API and it can be implemented in a way to support this.

I didn't say web apps can't do this — just that they currently do not do this. Certainly not in the way I saw handoff working at WWDC.

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