Also, if Silverlight is susceptible to the same vulnerabilities, then that makes MS hypocritical, not wrong! And comparisons with Java and Flash getting hardware shaders is beside the point - MS doesn't have control over which features those products choose to include or not, they only have control over IE and Silverlight.
I hope a reasonable scenario develops where IE does get WebGL, perhaps a whitelist of drivers that adhere to higher degrees of security for use with WebGL.