Most things are pretty locked down. That's not Unix-y. Yes, most defaults are pretty descent, but if you want more flexibility in your environment, there MIGHT be a 3rd-party tool for it, and it may even work, but if it does, it'll cost $20. It's like the world of Windows about a dozen years ago. Maybe in a few more years, this situation will improve.
I miss Linux. And, yeah, I know I can supposedly run it on a MBP, but I know that there will be nothing like the (nearly) flawless power management and screen switching capabilities of just running OS X, so I make do.