There are lots of technologies from manga/anime that do not exist in real life (yet), but it would be cool to see and have in real life. If you can bring these technological advancements in real life, what will it be?
I would personally love to have persocom (from chobit), a computer that will fullfill fantasy of many people yet useful at the same time.
Or at least something useful like the compact rebreather (size of a palm) for underwater exploration, such as the ones in pokemon series
