In case you missed it, Windows 7 with supported service packs, went out of mainstream support on 1/13/2015.
This means no further design changes or functional fixes/updates are made for the OS.
More importantly, extended support (security fixes, per-incident support) for Windows 7 Enterprise and Professional exists until 1/14/2020.
This is only about 4 years away, meaning that all workstations & running applications will need to be tested & upgraded to a supported OS by then to ensure continued availability of security fixes & incident-paid support – just as was done for Windows XP.
More on Windows 7’s coming expiration is available here: