Note that WIn7 only has 15 months of mainstream support left.
True, but there's a further 5 years extended support (the same level of support that is ending for XP next year) until 2020, so I for one have no plans to migrate all 5 of my home PCs from Win 7 anytime soon. I just hope that SP2 is released before 2015.
Microsoft Support Lifecycle
Let's have this discussion again in 6 years! Or, for Vista users, in 3 years time.
SD