As a blind user and developer I am absolutely terrified by such a prospect. We've just started to get decent accessibility for the plethora of new web features

As a blind user and developer I am absolutely terrified by such a prospect. We've just started to get decent accessibility for the plethora of new web features with ARIA and similar. But if you render everything to graphics output directly to a canvas you lose any capability of ever talking to my screen reader. Text is awesome for both people and machines, let's not throw it out.