You should be aware that a hefty percentage of software developers use OSX, I'd say 70% around here. They are easier to use for everyone, not just "people who don't know computers", and one of the best unix environments for development.
They are certainly (specially iOS) not aimed at people who like to spend hours messing with a thousand settings screens, buttons and checkboxes - self-proclaimed "power users".
He did say "OSX lately", and I agree. Snow Leopard was probably the best version of OS X, it's just been downhill from there. I don't want/care for things like Launchpad being in my OS.
Why does this actually matter? This is an honest question. I don't use Launchpad, but its presence on the system doesn't affect me any more than the presence of Photo Booth does.
I've been using OS X since version 10.2, I think (maybe even 10.1, looking at the timeline), and came to it in large part because it married things I liked about the Mac--but never quite enough to justify buying one--with the things I liked about FreeBSD and, to some degree, BeOS. And with every iteration of the OS it got easier for everybody to use.
But it's also gotten better for power users to use. Automator keeps seeing improvements. AppleScript, for both better and worse, doesn't seem to be going away. The Terminal app has gotten improvements with every release. And Mission Control -- whether you personally like it or not -- represents the latest in what's very clearly a quixotic quest on Apple's part to get everyone in the world to love virtual desktops. Mission Control may not be nerdy enough for you personally, but its very existence is pretty nerdy. (And I actually think power users should give it a chance; it's certainly not like anybody else's virtual desktop management system, but once I got used to it I found it struck a really nice balance between power and usability.)
Certainly, OS X is getting better at catering to neophytes and is bringing over ideas from iOS. But I don't see anything substantial that they're taking away from OS X in the process, and that should really be what concerns us, shouldn't it? If you start hearing credible rumors that they're taking away your shell prompt, then the sky may really be falling. But as long as you can still do everything you could before, complaining about the fact that you can also do swipey stuff on your trackpad and pull up a big iPhone grid of applications seems just a little silly.
They're slowly locking down the ability to install what you want from the Internet. Sooner or later, it'll be App Store-only or jailbreak. The (not-quite-a-rumor) transition from x86 to ARM will only hasten this.
I don't understand why people complain about Launchpad. It's no dumber than Front Row, which shipped on Snow Leopard and several versions prior, and like Front Row, it's totally hidden unless you choose to invoke it.
I liked SL for it's stability and performance, but nothing changed much in my workflow after ML. Sandboxed apps are nice, now I don't have to worry about every download. Launchpad doesn't do anything unless you launch it, and it can be disabled.
As a developer I use OS X only because I do iOS development. I wouldn't say OS X is easier for everyone, it's not easier for me than my Linux or Windows machines.
They are certainly (specially iOS) not aimed at people who like to spend hours messing with a thousand settings screens, buttons and checkboxes - self-proclaimed "power users".