It's important to note this line (below the first chart):
All the new input types are supported in all browsers in that they will submit their data as if it were a "text" input. These valuations are based on if they do anything above and beyond and/or validate against the type of data relevant to them.
So, the comfort level, for some developers, is in that the users will at least see an open textbox, which is probably what you would have used if those new types weren't in the HTML5 draft. And at least this way, M$ will get the idea that people actually WANT TO and ARE using these new types. And yes, they ARE blatantly encouraging their visitors to use non-IE browser
HTML5 is still a work in progress.
The client side web standards set will be a "work in progress" forever. No browser will ever be fully compliant. And they will always be in disharmony with each other, each creating their own features and standards to attract attention. Thus, the "HTML5" doctype:
The doctype really just indicates that ...