Future inventions: what would you like to have invented?

I thought I had an answer right away for this question but now that I think about it. I think maybe something along a lines of something where we can have our own personal air craft that can convert into a car. Most air craft have wheels for landing anyways. So if we could take the luxory of having the plane to fly and combine it with the convience of a car I think would save us thousands of dollars because if people had there own personal vehicles you'd have to have a certification ticket to own one and it would have to be approved through federal government, but it would keep down on road traffic and road repair as well as less accidents on the road and think of the jobs it would create for the air as well.