Microsoft
doesn't make MS Works any more; it's now an ad-supported, cut down version of MS Office called MS Office Starter Edition, which only comes with new OEM PCs. This limited MS Office only has Word and Excel, and is extremely cut down from its usual versions. This is better for compatibility, but ads? Really, Microsoft? They bundle this with a lot of new PCs, too, even high-end ones. I was on Dell, Alienware and HP's sites configuring PC laptops for the hell of it, and I saw MS Office Starter offered on just about all those computers.
And no, Windows doesn't come with out-of-the-box PDF support; you'll have to download Adobe Reader or Foxit. And to generate PDFs, you'll need yet another application. I honestly
don't think that this is a dealbreaker for most people (they're accustomed to downloading Adobe Reader anyway), but having those things built into the Mac is pretty cool.