Let us not forget how XP started out

http://www.zdnet.com/windows-8-is-the-new-xp-7000006095/

So, basics:

-Windows 8 isn't insanely popular, and business hate it

-Just like XP! And look where XP now.

Flaw that I might point out:

-XP got really popular since it had a huge lifespan. Vista was delayed, and XP still lived on well after Vista came out, and still today is the second most used OS. Windows 8 probably won't have that advantage.