I've been using Unix since version 7 (and even back then, knew enough to be able to unhang wonky device drivers using the debugger on the kernel in write mode, so as to postpone the need for a 45 minute reboot of a PDP-11 during busy times), and am definitely not some sort of clueless click-monkey, but for the most part, I like OS X better than any other workstation OS. I wouldn't use it for a server (except specifically to support OS X workstations; otherwise I'd pick Solaris for a server), but for interactive use, it's more of what I could want than anything else I've tried. Linux isn't evil or anything, but it's certainly not my thing. Too many design decisions were made for reasons I disagree with, and as an independent implementation, all the code in the original Unix heritage (v7, SysIII, SVR2 through SVR4, and even the BSDs) that I've read doesn't do me all that much good for figuring out quickly what the heck Linux is up to (what idiot went with overcommit-by-default+OOM killer? I'd rather get less done but have deterministic results than have stuff die semi-randomly! That's of course gotten better,
but it's just one example of something _I'd_ never had done like that).
Still, there are places where OS X needs work. The kernel could be more robust (I don't hang it up as often as I would Windows, but a lot more often than I would Solaris.) The userland RPC routines are horrible, compared to Solaris or even recent FreeBSD. I find myself using both MacPorts and scrounging other odds and ends from elsewhere (including porting some things from Solaris). Those are of course not the places that add the typical Mac sort of glamour, so they do tend to get neglected.
So...is Apple abandoning OS X just because they're into all this consumer and network stuff? I don't think so. I like my old iPod touch just fine, and will probably be an early adopter if and when there's a Verizon iPhone. But the apps for those get developed and written on OS X; and while I haven't gotten into that yet, I suspect with care one could write a full-blown OS X app that shared maybe 2/3 of its code with smaller versions optimized for the iPhone/iPod Touch/iPad. Contrast that with Windows and Windows Mobile: there are poor misguided fools that like Windows, but I've not heard of many at all that like Windows Mobile.
I think that the direction is that desktop, mobile devices, consumer appliances, and web (including - yuck - "social") services, and "cloud" services, all should work fairly seamlessly together. The desktop still serves an important role in that picture (for anything too flexible for a locked-down portable device or appliance, and for development), and I think Apple is doing as well as anyone to get the whole spectrum of these things (except for servers!) in place.