I have an older Surface with front and rear cameras and a pen. I can draw, annotate documents, and take photos just fine while using Windows 10. I can also use the whole universe of software available for Windows. Occasionally I might have to plug in a mouse or attach the keyboard/touchpad cover to use older software that isn't multitouch-friendly.
If Apple sold a device which was physically identical to an iPad but ran OSX (with some minor affordances to close the gaps between touch, pen, and mouse input- much as Microsoft has pursued in recent Windows iterations) I'd be ecstatic with it. I've considered trying a Modbook, but the price is a bit eye-watering.
Having access to a desktop-style OS would only add to the range of things you could do with smaller devices. Would it be harder to use than an iPad? Maybe.
You can put Linux on most Surfaces, and many of the cheaper Windows tablets. With pmOS, you may soon be able to put a desktop Linux OS on many cheap Android devices. The UX work for these use cases has been done - GNOME is now very much a mobile-ready and touch-ready environment, supporting real professional work. Plasma Mobile is not too far behind.
If Apple sold a device which was physically identical to an iPad but ran OSX (with some minor affordances to close the gaps between touch, pen, and mouse input- much as Microsoft has pursued in recent Windows iterations) I'd be ecstatic with it. I've considered trying a Modbook, but the price is a bit eye-watering.
Having access to a desktop-style OS would only add to the range of things you could do with smaller devices. Would it be harder to use than an iPad? Maybe.