Website accessibility impact SEO?

Website Accessibility is really hot right now in Canada (specifically Ontario, Canada) where those who don't comply could face penalties that include fines of up to $100,000 per day!

This is loosely enforced by the AODA (the ADA is the American equivalent).

My question is, how much do my SEO Redditors foresee this influencing SEO results?

After all, wouldn't Google want to serve sites where Web Content Accessibility Guidelines (WCAG) are being met when all other site metrics are equal?

Thoughts?