I must say I have a great deal of respect for Armin and thought he represents a good viewpoint. The convergence of some of Python's web frameworks is great and the fact that WSGI has become such a central specification is great.
In relation to Werkzeug and Python 3 you'd have to ask Armin himself but I think he said merely that a direct port of Werkzeug isn't likely possible as opposed to Werkzeug will never be ported to Python 3. Werkzeug is lower level and likely can't be ported directly due to a number of the differences between Python 2 and 3.
As he points out higher level libraries like Flask stand a far greater chance of surviving direct ports from Python 2 to 3.
In relation to Werkzeug and Python 3 you'd have to ask Armin himself but I think he said merely that a direct port of Werkzeug isn't likely possible as opposed to Werkzeug will never be ported to Python 3. Werkzeug is lower level and likely can't be ported directly due to a number of the differences between Python 2 and 3.
As he points out higher level libraries like Flask stand a far greater chance of surviving direct ports from Python 2 to 3.