I see a high value in a unix Os with a very low barrier to write native apps. IOs is a completely closed ecosystem on even has to pay to put a feet in. Android has the cost of java vm overhead and programming overhead. Eclipse makes me sick. Qt creator is much more efficient and productive.
With the possibility to hook a big screen to the device (hopefully a plug&play operation) we could directly program and fiddle with the phone. Though I think we will still need the power of a big cpu to speed up development process.
Hopefully, with the Os, we'll be able to program with our preferred language and use C compiled with Clang when we'll want the most efficient one.
This could be a little revolution and what I'm looking forward with this Ubuntu phone Os.