What a misleading headline. Google will now look at your mouse movement but really be scanning to see if they've been tracking you across the web. Anybody who is is concerned enough about privacy to block/clean cookies will be assumed to be a non-human.
And then you'll do a captcha like they would have you done previously. So either you're status quo, or you get an improved experience if you're in the vast majority that don't do anything other than non-default. What's wrong with that?
