What type of innovation is ride sharing?

http://toddwschneider.com/posts/taxi-uber-lyft-usage-new-york-city/

http://toddwschneider.com/posts/analyzing-1-1-billion-nyc-taxi-and-uber-trips-with-a-vengeance/

Based on Todd’s in-depth work, we clearly see ‘disruption’ of ‘taxi travel’ in some form but what kind? Clayton Christensen speaks about 3 forms of innovation; disruptive, sustaining and efficiency.

Based on Todd’s work, I think uber+lyft, at least in NYC markets, are a combination of efficiency and disruptive. More so efficiency but some true disruption.

Clearly they are taking away marketshare from traditional taxi usage but I think I see more area under the curves. That could imply car ownership or future replacement is experiencing disruptive innovation.