Very interesting that Google is making this change. It also shows just how much of an impact Google can have on our businesses, especially for those of us that depend on organic search results.
I found that Google has a tool to test your website. I tested mine here and was happy to see that Google considers my site to be mobile friendly.
If you want to test your site, just go here and put in your URL. Note that it is a single page test, so you should test more than just your home page.