Re: Backward compatibility to 7 @Jungleland again
I'm sorry but you have misunderstood the MS support policy.
First of all, the EOL for Windows 7 is 14 Jan 2020. The SP1 didn't push the EOL date forward at all.
The lifecycle page you quote means that MS will support those OS products for at least 10 years since their debut but to receive support you need to be on supported Service Pack level. For example, Windows 7 SP1 is required as of Feb 2013. Should SP2 arrive tomorrow you would have to install it within next 2 years to still receive support and updates. All support would still end on 14 Jan 2020.
Vista SP2 and XP SP3 were both released in 2008. Neither pushed back the EOL date at all; XP is now unsupported and Vista will be in 2017.