Then again, all things going well, i reckon i'll still be alive in fifty years (and the state of pension schemes nowadays probably still working too) also look how quickly we went from the first motorised flight to jet and supersonic a/c. Also look at the speed of development from my old BBC (them were the days) to the latest computers in airbus aircraft. I hope it takes ages, otherwise i'll be out of a job, but these things happen very quickly when someone's motivated to make it. Especially seeing as the technology is here, it just needs a little refinement.