To OpenID or not to OpenID? Is it worth it?

Question

Does OpenID improve the user experience?

Edit

Not to detract from the other comments, but I got one really good reply below that outlined 3

Answer 1

Personally, I think the value of a well implemented 'lazy registration' concept is far more useful than the OpenId itself.

I already have so many accounts online I don't mind registering on new websites, but forcing me to sign in just to see what the service is about, or to complete an order, is very annoying with or without openid.