I have a folder of epub books on my computer filled with books I intend to read, but instead of depleting it just keeps getting larger. Doesn't stop me from adding more as I come across them.
I load up many many on the kindle and that is my TBR for then. I choose from that list but then if some thing catches your eye in between then that takes priority. But I have also had some books on the Kindle and never read but not deleting it with a thought that I might read it some day. And in some instances knowing that I will never really read it.