Hey MIT, since you're reading this...I've been dying for a browser wallet that I can use to easily make small payments for news articles. I'm tired of surveys and pop up ads and I don't use enough to justify a monthly membership. Figure out a way that I can donate 10-25 cents to read an article and I think you have an actual use case where btc isn't reproducing existing function.

Also, see how resistant bitcoin is to doublespend. Take a single bitcoin and spend it at several brick and mortar stores simultaneously and see what happens. With ten minutes to process anyone in a quick in and out situation should be out the door by the time the transaction fails. Be sure to actually pay if the attack works, you don't want to screw local businesses but you do want to expose any vulnerability.