I think personal keyboards are the new time capsules.
People spend more time in front of their computers now than they did 10 years ago. Many hours per a day, several days a week are spent there. Those not of the anal retentive persuasion eat, drink and and do other things in front of the computer.
What's trapped behind [and on] keys says a lot about a person.
For instance, my keyboard would be a blessing for an archaeologist as its almost a complete archive of my personal habits.
I have a black battered keyboard. Beneath the keys is a jungle of fuzzy tobacco, ash, loose hair and dog hair. On the keyboard itself there's always a few ash-turds, little melted spots, mass amount of grime and a generous smattering of suspect human fluids.
My favourite keys are 2, spacebar, M, A, N and >. The 'control', 'windows' and F3 [which brings up the 'find' toolbar] keys are covered in thick grime as if never used.
Maybe there's a new job description out there? keyboard readers are the new palm/tarot readers: "
I see you have a history of homosexual activity and have a reluctance to commit as you feel people are inferior to you. I also see that you have no control in your life and cant find your path. You also have a lack of vitamin B and will die of lung cancer."