What Tasker tasks require root access? I'm thinking of installing Tasker on my phone, but I don't want to root it.  Is it worth my while?

What Tasker tasks require root access?  What can it do without root access?

Edit:

Here are some examples:


I would like to turn on the GPS whenever I start certain apps (various driving directions apps, for instance), and turn it off when I exit them.  I understand that apps can't turn on the GPS (otherwise the apps in question would do it themselves instead of directing me to the settings).  Tasker claims to be able to do that.  Does it need root for that?
I remember seeing somewhere (lifehacker maybe?) that Tasker can disable the lock screen based on location, such as when I get home, and turn it off when I leave.  Can it do that?  Does it need root access for that?
The simple answer is that it requires root to do things that would require root if they weren't automated by Tasker and you were doing them manually.  Tasker is irrelevant.

Edit: Turning on/off GPS does not require root.  Apps must be able to do it, because Power Widget can.  As for the lock screen, I think what you read must have actually referred to the keyguard (the "swype to unlock" screen).  The phone is not locked the same way as it is with a pattern/password when the keyguard is on; it's just to prevent accidentally keypresses, not for security.  Tasker can disable the keyguard.