My concern with both Windows AND OSX is that they are pushing forward with "Tablet Interfaces". OSX is already shifting towards an iOS look (in fact developers from OSX have been re-allocated to iOS..which I can't blame them as its the cash cow), and we all saw what windows 8 looks like. As part of my job I use both platforms in tandem all day (PC for my 3D Suites as well as the Adobe suite...which runs FAR faster on PC than on the MAC platform), and my MAC for Keynote (Use it once and you'll never go back to powerpoint) for client pitches, and for Logic. ALL the applications I use do NOT benefit from a "touch" interface, and I fear that in the future I won't have a choice. I don't mind "the cloud" so much (using Carbonite, Dropbox, And Google Drive), but I do not see that the world is ready to ditch physical media (90% of my clients deliver us assets via DVD/Bluray, very few have adapted to online methods).
Honestly..and this may sound REALLY out there to some of you, They should really start investing in a true *nix system...they can code their own software cheaper than they realize. As I side project I have been working with a Raspberry pi (a cheap ($50~) credit card sized linux ARM PC), and the power that thing has is impressive...AND its super easy to work with. I know they aren't about to re-do an entire network (and I don't blame them), but moving forward it would be nice if they could plan future additions around a more stable sysetem (both Windows and OSX are resource monsters and thus instabilities)