1. In the year 2026 (10 years from when I make this prediction), in 1st world countries, more than 50% of bicycles sold will have a battery built in. It may just be to change gears (eg Di2) or power a light, but will likely power the bike.
  2. eMTBs will be available with smaller less-powerful motors and batteries than commuter and touring ebikes, and it will be feasible to carry multiple of these smaller batteries. The purpose will be to get you up hills so that you get down with gravity and less weight penalty.