IMHO, I think it would be extremely helpful to some web developers to be able to specify a specific page to be loaded when a user is "logged in" via rememberMeServices, right out of the box. This is especially true for developers who set the always-use-default-target="true" in the <form-login> tag. If you want the <remember-me> tag to act in the same manor, the learning curve gets pretty steep.
It would also be useful if the user's session always needs to be re-iniated by the web application after an expired session. Having the target-url go to a page the tells the user their session has expired, they are being redirected to a "start page", and automatically logged-in is helpful.