[steeleduncan]

> Technically they could make those changes to the OS, but why on earth would they?

Look at their history, there has been a gradual trend in the app store from free-for-all to sandboxing, and now code signing is moving beyond the App Store. The question is why would they stop their current trend?

> Arguing that Apple would move to a signed-only experience is essentially arguing that they would sell only iOS devices

I think it is highly likely that in the future Apple will only sell iOS devices. Look at the XServe, a profitable product line killed off solely because it didn't fit in with Apple's strategy of mobile media consumption.