This quote rings very true to me: “The next big thing is always beneath contempt.”
I was one of the people that wrote off Twitter as a useless fad that would never catch on. For a while I also told everyone who considered buying an iPad to just get a laptop instead of a toy.
Hindsight has proven me wrong before, and these days I give more thought to what a new "fad" could be, instead of letting out a derisive snort.