It is a cliché that people use a napkin at dinner (or a bar, or a cocktail party) to make a great discovery, do an innovative design or exchange some world changing idea.
Just because it's a cliché doesn't mean it's not true.
However, today, two people at our dinner party were using a Samsung Galaxy Note (it's a giant smartphone or a tiny tablet depending on your point of view) with a stylus to do exactly what has been done with ballpoint pens on napkins for years!
I got home in time to see all my kids although E5N1 was very very sleepy. Earlier in the evening he had done one of his (optional) homework assignments: write or draw something you look forward to doing over the holidays. His answer was part sketch, part technology too:
It reads, "Play LEGO Star Wars with my Dad" and there we are with our Xbox controllers!