Tablets and smartphones have sparked the rapid ascension of the mobile ecommerce sector, and that growth isn't expected to slow down anytime soon. If you don't want to take my word for it, there are plenty of studies out there to back this statement up.
If you're a small business owner, this is mostly good news. You might not feel like it is - after all, you may have just gotten a handle on the whole internet website thing. Adding mobile into the mix means you have yet another platform to manage.
I understand your concern, but trust me when I say it's not as difficult as it seems. All you need to do is have the right focus in mind.