I'd never ever do a software subscription. What I buy is mine, and I can use it as long as I like, forever. If someone selling something won't "allow" me that, I simply don't buy it. Same thing with Adobe Creative Cloud subscription.
Also, no need for another cloud storage provider (happy user of Dropbox, but would anyway never give more data to MS than I have to), and no need for Skype minutes too. If I happen to call people, it's computer to computer which is free.
SaaS may be good for businesses who already know they're going to update to the "latest and greatest" as soon as it launches (and also have a steady cash flow), but for home users, students and freelancers I think it's completely stupid. At some point you happen to no longer have enough money to keep your sub up. Poof, your applications are gone. So, if you earn your money by working with those, you're pretty much eff-ed at that point, obviously.
You already need MS Office if clients send you such documents, because neither iWork nor free office suites can open/display/handle these files 1:1. iWork has also a right to exist because it absolutely excels in layouting. Sure, I could do it in InDesign too and potentially even better, but there's much more work involved. I've got both iWork '09 and Office 2011 on my Macs.
I haven't heard of any new "breakthrough" must-have feature in Office 2013 yet, so the 2011 suite is still pretty much sufficient for me.