It's a beautiful photograph, Jeff -- congratulations!
I agree that nothing matches the impact of getting your work 'face to face' with potential buyers.
I think a big part of the problem is size. Most people have a really hard time visualizing size - even when measurements are provided. Looking at something on-screen will never be as effective as holding even a smallish print in your hands.
That's why I carry an 11x14 portfolio, wherever I go. This year, I've sold more prints from my book than I have through FAA. If I could carry a bigger bag, I'd probably cart around a 16x20 portfolio! ;-)
Online selling is great, and I've been lucky enough to sell a lot of work online over the last decade, to buyers all over the world. But, nothing beats 'up close and personal', so I work at doing both!