While these are the major limitations, numerous lesser ones may still be critical for some users. You may have essential apps on your Mac that do not exist for the iPad. You may not want your app choices to be limited only to what Apple permits in its App Store.
Still, for people who own both a desktop Mac and a laptop, I believe the day is soon approaching when most of them will give up their MacBooks for iPads. But the day when the iPad can replace every Mac is still not even on the horizon.
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