As a trainer and consultant, if I had a nickle for every student/client that called me crying over lost DVDs and license numbers when trying to install on new machines, I'd own every Trump Tower in the world by now. I applaude and love the Mac App Store. Invasive? No more than when you fill out the registration window of your DVD based installations.
Drive crashes, machine stolen, studio burns down, upgrading to newer Macs, etc, etc, etc. I've dealt with it all. And simply loging into the Mac App Store and re-downloading is wonderful. "You already bought this, do you want to download it again for free?" Yes I do, thank you very much!
Why do so many folks fear progress, and why do so many equate difficult with professional? Difficult and old has nothing to do with professional.
I was actually at the SuperMeet sneak peak, and I did not see anything at all that was NOT fully professional, nor anything to indicate we would lose anything at all.
Intel and Snow Leopard were made clear that was the FCP X spec, and it will scale from a MacBook Pro to an iMac to a Tower. That was clearly stated. Grand Central will use whatever resources your Mac has, as few or as much as it has, and that's as simple as it gets.
Let the speculation about how all of our business will fail continue, I guess...