For Boot Camp Users, New Macs Require Windows 8 Or Newer
For anyone using Windows 7 by way of Apple's Boot Camp utility, beware: support for Windows via Boot Camp remains, but for the newest Apple laptops, it's only for Windows 8 for now. From Slashgear:
This applies to the 2015 MacBook Air, and the 13-inch model of the 2015 MacBook Pro. Windows 8 will remain compatible, as will the forthcoming Windows 10. The 2013 Mac Pro also dropped Boot Camp support for Windows 7, while 2014 iMacs are still compatible, along with 2014 MacBook Airs and 2014 MacBook Pros.
For those who still prefer to run Windows 7 on their Macs, there are other options. This change to Boot Camp will not affect using the Microsoft operating system through virtualization software, such as Parallels and VMware Fusion. Also at PC Mag.
From a Windows user to Mac users, my condolences if you're forced to use Windows 8. You'll probably see what Windows users were bitching about. I'd definitely recommend you just skip it and move straight to Windows 10, as it's got most of the cooler features and internal improvement of 8 and much less of the crap.
Oh, and it will fit in nicely with the flat-looking aesthetic that both Microsoft and Apple designers are apparently still madly in love with. You'll note that Apple designers, of course, can still make that look fairly decent, while Microsoft, as you'd expect, just makes it look hideous.
Irony: Agile development has too much intertia to be abandoned now.