Here's a pretty nice R.A. Dickey relic card from 2014 Topps Tribute. It's a plain white piece of fabric, but the card has a nice design to it and Topps chose a decent photo for the card. It is serially-numbered as # 56 / 99. I would imagine that means it is some parallel of the Tribute Titans insert set, probably bronze or gold or something.
I have been wondering to myself what the next big thing after relics and autos will be, simply because at some point the card companies are going to run out of relics and cut autographs for the long-retired and deceased big names in sports. I have't come up with a good answer for that question, but I would imagine that is one thing that the card makers have on their minds behind the scenes as they look at the dwindling inventory in their boxes of Babe Ruth bat chips and cancelled checks.