Printable solar panels via Nanosolar. Nothing fancy nothing amazing, just pushed the technology to be easy and cheap to manufacture. They can manage to print it out for about $.3 a watt. Which is pretty much cheap enough to use as wall paper.
NuVinci CVT (continuous variable transmission) is a nifty little design to change gears without set gear levels. They are currently using the design for bikes. My brother would use it for a unicycle (a gear shift on one of those would be like magic). And it probably is going to have some great applications in wind turbines allowing them to maintain their power output without spinning so fast as to burn out or going so slow as to generate no power.
It doesn't exactly change everything, but it does make a number of things considerably better, smaller, and some things previously non-economical become economical. I think a car with a continuous transmission would be pretty awesome... and I bet it wouldn't blow out as quickly.
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