Not PowerPC related, but:
Here's my "Yosemite" desktop, actually its Linux Mint 13. Look, I too have a translucent dock (with Docky, had that for years). Grabbed the Yosemite picture today from somewhere. This laptop cost a mere 122 bucks four years ago, which works out to about 8 cents a day, so far.
Plays HD up to 1080p just fine, runs Office 2007 and PS3 in Wine, Windows XP and OS X Snow Leopard in Virtualbox (though admitedly it does not run Snow Leopard very well). Minitube and SMtube for watching Youtube outside a browser, Firefox 29, Chromium 34, Seamonkey, Opera, Maxthon round out the browsers. Skype and Dropbox, and XBMC. Rhythmbox, VLC 2.2 and Gnome mplayer, and of course the Libre Office suite.
I was a dyed in the wool mac cultist for 25 years, but...anymore Apple just seems like that embarassing rich Uncle with the Corvette, trying to impress..I dunno, somebody.
Yawn.