Suffers the same problem: long on words, very short on evidence. It's theology.
I pointed to the trend of traditional web properties moving to native apps when it came to mobile. Things like nytimes, economist, and even Facebook.
I discussed how most new social networks on mobile that have gained any traction or attention (such as FourSquare and Path) were largely a native phenomenon (even Google+ chose to have a native iPhone app).
I talked about very real examples of how Flash was important in the development of the web.
I believe that there are a lot of valid counterpoints to my argument, and I'm actually really interested in hearing and thinking about them. However, I don't think hand-waiving it away as "theology" is one of them.