If you're out by the toll booth and there's no light in your bag, car or the rat-hole toll booth then you may well end up overpaying or underpaying and embarrassing yourself in the process. So we have this awesome concept from China that has currency notes that glow. How cool is that? If will make Uncle Scrooge's room look like a bio-waste plant with all the glowing green.
Notes that emit a soft glow, just enough to ensure you hand out the correct note; nothing more nothing less.
So will we see luminous money in the future? Never know. I feel that we're already in the future.