The Windows 10 Review for the Windows 7 User: Misses More than It Gets
So that is it for the (mostly) quantitative part of the review. We can see that the platform is pretty bug ridden at the moment but still sufficient enough. The UI is reminiscent of the 8.1 aesthetic that was more or less forced down the throats of the users before and it seems Microsoft has yet to learn from its mistakes. That said, most of the unintuitive and clumsy parts have been removed - third party programs like Windows Blinds will have to account for any remaining deficiency.
Cortana is a hopeful addition to the Windows platform and while it still doesn't quite live up to its name, its helpful enough to warrant its existence.
For Windows 7 users, Windows 10's primary redeeming quality is the DirectX12 API
The Edge browser is a worthy browser in its own right, and while it shines in certain tests, its lack of certain key features (related to HTML5 and Codecs) is a crippling disadvantage which will mark the difference between users treating it seriously and just as another Internet Explorer (which its icon, once again showing Microsoft's affection to delve in past mistakes, is awfully similar to Internet Explorer).
As far as the general performance increase goes, Windows 10 is lighter and faster than Windows 7. Although, the performance increase is in the single digits and limited mostly to processor and graphics intensive workloads. For the most part, there is on discernible difference between the Windows 7 Experience and Windows 10 RTM.
Finally, we come to Gaming performance and it is abundantly clear that this is the only reason that could actually force the Windows 7 crowd to shift (the gamers at the very least). DirectX 12 is an absolutely behemoth of an update and will result in performance increases measured in orders of magnitude in certain configurations. However, in this case, Nvidia Fermi cards (Geforce 400 and Geforce 500 Series) are currently at a disadvantage due to driver incompatibility.
Windows 10 is out and yes, people will eventually be forced to migrate to it; but on grounds of merit alone, it is a case of too little too late.