Not to make a connection between Vista and Windows 8 other than sales results, the adoption rate of Windows 8 is slower than Vista was in the same time frames after their release. Although, to be honest, PC sales in general are a bit less, too.

Windows 8’s failure to stay abreast of Windows 7 or even Vista is not hard to explain, said analysts, who have been predicting a weak reception for the new operating system, blaming a weak economy, the OS’s confusing dual user interfaces, enterprise upgrade fatigue after migrating to Windows 7, and competition from rivals’ tablets — including Apple’s iPad, Amazon’s Kindle and Google’s Nexus — for customers’ technology dollars.