Apple is a good example James... They started out with FireWire and then moved to the Thunderbolt standard... and even with the iPhones having the larger power adapter and now the smaller one. Some of these changes have got to be the result of the need for smaller ports that are more compatible with thinner and thinner notebooks and circuit boards but ebikes have a lot of the same constraints (be lighter, be less intrusive) so I think we probably will see similar trends.
It is nice however, to see standards like USB, USB2 and USB3 that are backwards compatible with computers. Now if you look at the new EnergyBus magnetic charging port standard on ebikes we could be seeing the same thing. I hope it's smart enough to someday work with monitors, wireless controls and other stuff that might come out. It's a piece of technology that's neat to see on bikes like the Specialized Turbo and A2B Alva.