Mobile Design Matters

By the end of 2015 mobile is predicted to overtake desktop internet usage. 40% of users will choose another website in favour of one that is not optimised for mobile.

http://freshsystems.co.uk
Not having a mobile-friendly website is highly predicted to have a negative impact on search engine rankings.
70% of mobile searches lead to online action within an hour. Mobile searchers are buyers, assuming your site can meet their needs.