As long as you'r happy with the card at the moment then you don't need to goto the new drivers. If you start having any problems then try upgrading but until then its not really needed. Although it is very fast to install the new drivers (no more complex then double clicking the .exe and restarting the machine, although there is the download time) so you might as well give them a try incase they give increased performance in any games (for example the 7.111 drivers doubled the speed of NFS5 Porshce Unleashed). One good thing about new Kyro drivers is that they don't usually brake stuff that worked in previous drivers (which is something that can't be said for some graphics chipset drivers) so there's no harm in updating them, only potential gain.
I'm running 7.111 now and have upgraded with each driver release. I was just curious why they don't articulate in detail, what the driver revison repairs. I usually flash my Bios and chipsets when there's upgrade and I've never had a problem.