, Bas wrote

Ars Technica speculates that IE10 might depend on Direct3D 11.1, which would mean they'd either have to rebuild that part to run on Direct3D11.0, or they're porting Direct3D 11.1 to Windows 7.

But there were IE10 technical previews for Win7 before. Unless the D3D part is in the chrome (which wasn't in the previews) and not the browser itself, that's not it.