That knock showed his potential as a test match cricketer, just think he needs an extended run in the side. It was a bit of a case of "you've not had a knock since last summer but carry on where you left off" which isn't the ideal situation when you do get selected.
Oh, his three knocks over the winter do little more than contribute to the lies, damned lies and statistics debate - a guy with no first class playing time told to suddenly make runs in a test match is not likely to succeed too often. And those knocks showed more than promise...
...but still I'd say he has something to prove, if only in terms of his technique against spin.