This day finally got here. The first prediction was that mobile would overtake desktop users last year but it's now May 2015 and Google is saying that more searches come from mobile devices:
It’s Official: Google Says More Searches Now On Mobile Than On Desktop (searchengineland.com)
Company officially confirms what many have been anticipating for years.
The company says that “more Google searches take place on mobile devices than on computers in 10 countries including the US and Japan.” The company declined to elaborate further on what the other countries were, how recently this change happened or what the relative volumes of PC and mobile search queries are now.
This means that your website needs to be set up so that it works well on mobile devices. This is called responsive design. It's all we do now (for a while). It's part of SEO because the design is part of the user experience. The websites with the best user experience will rank higher.
If your website has not gone through this conversion yet, it needs to because Google has already adjusted search results to rank websites lower that don't work well on mobile devices if the search originates from a mobile device (smart phones and tablets... and now watches).
To test your website, just go here:
https://www.google.com/webmasters/tools/mobile-friendly/
If you fail, please contact us and we'll get you a quote.
-Tony