Previously all browser manufacturers cooperated with changes in HTML 5. That included everyone except Microsoft. This meant that developers had to code two versions of their web site. One would be specific to Internet Explorer. That is no fun.HTML 5 supports Scalable Vector Graphics support. Some have speculated that Microsoft is concerned that SVG infringes on the Silverlight solution space. Luckily Microsoft is no longer holding out on HTML 5. They joined the SVG working group. Things are looking better for HTML 5.
