Research on the breakthrough technology needed to make your invention work in the future. What you need to find out or research on are technological breakthroughs [e.g., scientific processes, technological innovations, discovery of materials or scientific principles] that are necessary to make your invention a reality in the future.
Below are sample of technological breakthroughs from exploravision:
http://dev.nsta.org/evwebs/3253/
http://dev.nsta.org/evwebs/299a/breakthroughs.htm
http://dev.nsta.org/evwebs/2873/
http://www.futureforall.org/whatscoming.htm
http://www.futureforall.org/whatspossible.htm