The fact that Windows Phone 7 doesn't support HTML5 may not be intentionally strategic, but it affects Windows Phone 7's strategic future nonetheless.
Look, the way I see it, WP7 is barely months (weeks?) old. To expect HTML5 support when 'HTML5' is in still flux is silly. MS are still working on their desktop support for goodness sake.
Lack of copy-and-paste demonstrates clearly that MS couldn't get everything in to v1.0. And to impute strategic motives is reaching.
For the same reason, it's hard to convince myself that I'm being "silly" for having an expectation as a web developer that a new mobile OS platform in 2010 would have decent HTML5 support. What a step backwards for the mobile web.
Er… their competitors’ phones support a lot more HTML5, CSS3, and related APIs than they do. Who’s silly, exactly?