People love to talk about how the web is about open standards and such, but it really is rather quite closed.
It's driven less by standards and more by de-facto implementations. Soon we can get rid of the standards committee and just talk to the implementers of webkit to define the "standard".
And I think even worse has been the wholesale discounting of plugins. I still strongly believe that being tied to JavaScript as really the only client side language is a mistake. It's not a great IL and limiting the language for such a pervasive platform is scary. I powerful plugin model would be, IMO, one of the best things to a truly powerful web.
I wish the web was more open. I wish that browsers were a truly extensible runtime that specified lower level abstractions, that allowed more innovation at the top of the stack.
It feels like we're walking into the dark age of the internet.