That's just nonsense. The majority of people uses computers for a few basic things:
And all of the points above are a better experience when using an iPad compared to a desktop computer.
- Browsing the web
- Reading and writing emails
- Watching photos
- Videochat
So, could you please elaborate your statement why the majority needs Mac OS on an iPad?
My wife has an iPad, and uses it for the activities you mention above. But to pick one item in particular, she has accumulated a large number of emails (ten of thousands) over time, and the native iOS mail app is absolutely incapable of tackling a job like that. To quickly delete a large number of emails, or to do something as simple as sort by sender or sort by subject requires a real computer running a real email app.
I don't object to Tim's "many many people" remark, but for him to say “I think if you’re looking at a PC, why would you buy a PC anymore? No really, why would you buy one?” is reprehensibly stupid.