First, I have yet to see a wave of mainstream technology that lasted more than 2 seasons. Bonus points if it truly solved a problem that businesses have. (Note that this is distinct from solving programmer's problems.)

Looking at my children in the corner playing pbskids, I am struck by how much more productive designers were with Flash and related technologies than they have yet to become with any of the current technologies.

Second, I have yet to be involved with a major "mainstream" technology choice that did not crash and burn terribly. These choices have often ended in public disaster for companies. It has truly become amusing.

Now, does this mean you can't make it work? Of course not. But, with the numbers as they are, realize that even at 1% or less... you actually aren't that unique in the world. But your experience still doesn't scale.

(And I realize this last criticism can relate to me, as well. This is why I won't personally stone wall any choices. I do ask pointed questions about when we will get to focusing on customer's value. So long as we are answering that, I just don't care on the technology anymore.)