Checks may seem "quaint" to you techies, but vast swaths of America's infrastructure and social mechanisms are still greased this way. Checks are superior to cash in too many ways: if I'm carrying my checkbook, I'm technically carrying as much cash as I have, and the recipient doesn't have to make change. If I send my kids to school with a check, lost,stolen, or "misdirected" is not an issue. Plus, I always have a receipt.
I've been doing this for years through my credit union, with my flatbed scanner. With cell phones commonly pushing over the 3 megapixel mark, it's not at all surprising to see this as a natural extension of the existing process.