If you are a typical computer user; email, web, e-commerce, communications (Skype, messaging), and even casual office work - from spreadsheets to documents, presentations and both... create and consume - maybe some light gaming etc... absolutely, I watch my wife and have watched her, since the 12.9" release... completely abandon her 2014 15" MacBook Pro/family iMac 😉
She's been with the FAA for a couple decades and - obviously, she's mandated to use the systems at work provided by the government, but here at home - all iPad all the time and she has not touched the home Computer in a year or longer.
With $100 AirPrint printers, incredible continuity between devices and using iCloud and Dropbox... her 'everything's' protected redundantly.
I've yet to help her with workflow if something isn't as streamline as the 'old days' (we're both late 40'somethings😉)
J