Steven Sinofsky was President of Microsoft’s Windows’ division from 2009 to 2013. From his blog post about moving to an iPad as his full time machine:

Unlike many “use a product for month” tests this is not an experiment. For me this is a deeply held belief that the rise of smartphones (specifically starting when the iPhone launched) would have a profound impact on the way we all use “computers”.

The transformation spans hardware (thinner, lighter, smaller, cheaper, longer battery life, instant on/off, touch, sensors, connectivity, etc.), operating systems (more: secure, reliable, maintainable, robust, etc.), and app software (refactored, renewed, reimagined, etc.). It is the combination of these attributes, however, causing a change as fundamental as the leap from mainframe to workstation, from character-based to graphical OS, from desktop to laptop, from client/server to web — perhaps equal to all rolled into one shift if for no other reason than the whole planet is involved.

And:

Note: This is not a Mac v. Windows or iOS v. Android discussion, so no snickering please. This is about a shift to a “modern mobile” computing platform from hardware to software and the cultural changes that surround that.

I find it fascinating when folks move to a tablet as their full-time machine. I can’t imagine doing that. A big issue for me is the fact that Xcode only runs on my Mac. Add to that my frequent use of a large screen for both editing (multiple windows open side by side) and for development (side-by-side code listings and complex storyboards).

Sinofsky’s post is compelling and worth reading. Interesting that he made the choice to use an iPad and not a Surface solution.