This is expected to be a major update and honestly pretty impressive. I like the iPhone design in the mac.
I have been waiting for an macOS update and this does not disappoint at all. Really neat and power packed.
BiyoBiyo JunJun, 11 Nov 2020"Big Sur will also support iOS and iPadOS apps natively." so , all the apps we do... moreShould be the case for most apps but developers can choose not to make their apps available on macOS and just iOS and iPadOS