Maybe a Mac with a touch UI mode and a more modern architecture, that is cleaner and has a more restrictive security model - but still a Mac.
They'll say they don't for purity reasons, but their desires show otherwise:
- Add ways to show multiple apps on screen at once (e.g. windows – but because they don't overlap, oh except for slide-over items, then it's new and therefore they don't have to admit they are asking for windows)
- Add a hardware keyboard
- Make the hardware case with keyboard into a laptop form factor
- Add a touchpad
- Add a way to drag and drop items between on screen apps
- Add keyboard shortcuts
- Add the Finder, oh sorry, I mean Files.app
- Add a menu bar for Pro apps
- Next they'll ask for a menu item to appear onscreen when an item is force touched; e.g. right click contextual menus
Congratulations, you've invented a MacBook. At least you'll feel good about yourself as you can now think you're using "the future of computing" instead of simply an evolved version of what everyone was using a decade ago.
This is a pessimistic but IMO true evaluation of how techies who are proud of themselves for using an iPad for 'real computing' self evaluate the decision.