It's still the early days of the internet when it comes to small business. Fully 40% lack a Facebook page or website and 60% lack having both. The vast majority of brick and mortar businesses to not allow online sales nor have even a mechanism for people to view actual inventory on a digital medium of some kind.
If you're looking for the next big tech opportunity it's in helping businesses with fewer than 50 employees expand their reach outside of the 10 mile radius around their physical locations.