How many web users be unable to use my app if I used HTML 5?
I was looking at a wiki page on HTML5 support and left it feeling a little confused. Here's the [link][1]

If I understand it, then IE has near to no support and the others have between a little and some. none have lots.

So HTML 5 incorporates a load of different technologies, some closer to completion than others. So let's focus on say Canvas and drag and drop and anything else you think would make sense, Video tag? You choose.

I'm also not sure what has changed in Javascript. I assume there are new APIs for things like Canvas? 

Would a significant segment of web users be unable to use my site if I only used HTML5, especially the fun stuff, Canvas, etc?


  [1]: http://en.wikipedia.org/wiki/Comparison_of_layout_engines_%28HTML5%29
How many web users be unable to use my app if I used HTML 5?
===

I was looking at a wiki page on HTML5 support and left it feeling a little confused. Here's the [link][1]

If I understand it, then IE has near to no support and the others have between a little and some. none have lots.

So HTML 5 incorporates a load of different technologies, some closer to completion than others. So let's focus on say Canvas and drag and drop and anything else you think would make sense, Video tag? You choose.

I'm also not sure what has changed in Javascript. I assume there are new APIs for things like Canvas? 

Would a significant segment of web users be unable to use my site if I only used HTML5, especially the fun stuff, Canvas, etc?


  [1]: http://en.wikipedia.org/wiki/Comparison_of_layout_engines_%28HTML5%29