All right, here is a sample:
Powering Automobiles without petroleum products. They will be electric, however, the energy storage systems will not be batteries. The reason is that batteries weigh too much in relation to the amount of energy that they store. Resulting in restricted range and sluggish acceleration.
The solution will be super conductivity. With super conductivity it will be possible to construct tori that will store electricity by spinning electrons around a frictionless circle. It is estimated that this device will be able to store energy in densities the same as gasoline and internal combustion engines. This will result in electric cars that drive with the same sprightly acceleration and handling as a gasoline powered car (and the same range).
This device has yet to be engineered, but it is entirely within the realm of physical possibility.
One interesting possibility of an electric car is the elimination of geared transmissions. Direct drive all four wheels with an electric motor on each wheel. With electronic control to control revolutions per minute and torque of each motor individually, it will be possible to mimic differentials, transmissions, all wheel drive without power robbing mechanical systems. Also, electronically controlled direct drive systems, (in use presently in copying machines, washing machines, phonograph turntables, attic fans) are much more reliable than the purely mechanical systems that they replaced.
Out of the box enough for you?