The difference is that Blackberry let you do something you couldn't before.

Which is this entire thread -- what can you do with AR that you couldn't before?

> what can you do with AR that you couldn't before?

Its my belief we are about to find out in the next 3-5 years.

The only compelling answer I can think of is "everything we already do now, only untethered by physical location."

Which is less about polish and more about deployment volume and/or standards interoperability.

Immersion.