I saw this linked elsewhere and it's a good watch about the S-Curve for technology adoption: http://www.youtube.com/watch?v=qHUPPYzzZrI

The network affect should encourage adoption similar to Google, Facebook and Twitter, so the case for an S-Curve has legs, IMO.

Assuming we will have S-Curve adoption, I wonder when it will arrive? Are we already at the start of it? The next few years could see value appreciate in a near vertical fashion, before tapering off again.