We do have a premises i.d. number. We have some friends here in WY who are participating in the pilot project, and they have done great with it. They do track their cattle all the way and get the carcass data back. They've made great improvements in their herd (which was already quite good). We have some other WY friends who have chosen to i.d. themselves - and they did get a premium on their cattle.
I attended some seminars on i.d. last fall. Sounds like those who get in early could/will receive a premium, and can use it to benefit their herd. Technology is still advancing, however, and you may end up buying something that will be better / less expensive down the road. However, soon i.d. will be the norm, and those who don't do it, but be docked later on.
It doesn't cost anything to get a premises i.d. # and it is easy to do.