[scholia]

Microsoft had precursors for most of those, including pen operation via MS DOS extensions (in the 1989 GriDPad) and the intelligent Office Assistants in Microsoft Office 98.

Otherwise, the interesting point about Windows 10 is that so much of the technology was carried across from the smartphone industry, including Cortana and notifications from Windows Phone.

I'd have thought that creating a converged mobile OS to cover IoT devices, games consoles, smartphones and all types of PCs required innovation.

On the same basis, so did "PC innovations" that included features from minis and mainframes, and smartphone innovations that had already appeared in various PCs and handhelds.

Unless you're actually a research organization, pretty much every innovation will have more to do with implementation than with pure invention.