From what I know (we had a discussion about this earlier), this pic was born after a party at night and then based on forum threads asking what is your favorite future invention. I don't see a joke about hangover cure in threadless tshirt (actually this is the first time I see it, I doubt the author saw it either), and this is the most important part of the pic :)

Besides, this trend is going for a long time, I'm not even sure who started it
www.google.com/search?hl=en&q=where+is+my+flying+car