For some people, the iPad replaced their laptop/desktop 9 years ago. For others it was 5 years ago. For others it was 3 years ago. For others it was last year. For others it was never. It depends on the person. But also, I feel like "Does it replace the Mac?" is, and always has been, the wrong question. Nobody who wants to use a Mac needs a device to replace their Mac. They'll just use their Mac.
If you're keen on using the iPad as your main computer, the only real question you should be asking is "Does the iPad work for ME as MY main computer?" If you're trying to figure that out, I'd say the absolute LAST thing you should do is come here and ask. It would be much better to do some research online (I'd say most answers could probably be found on Apple's iPad site or on some of the more Apple-centric blogs), try the features on a real iPad in the store and see if you like them, and go from there.
Whether your prefer to use a Mac or an iPad to get your work done, there will always be 1000 people on the Macrumors forums lining up to tell you what a moron you are, so this is not a good place to go if you want to feel good about your choices. With the release of iPadOS, the people who constantly deride the iPad as not being a work device will just continue to move the goal posts to support their arguments. Yes, it definitely takes care of some of the low hanging fruit that people have been complaining about for years, but they'll find more complaints. For some reason, the very existence of the iPad Pro seems to threaten peoples' Mac user-ness.
Me personally--these days all I need is my iPad Pro. I have a work Mac, but only use it because I'm required to. Wouldn't care if it was gone and wouldn't buy my own to replace it. And I'm not a "content consumer". I do high end photo editing in Affinity Photo, art creation in Procreate, music notation in Notion, video editing in LumaFusion, audio editing in Ferrite, documents in Office 365/iWork, the list goes on and on. It's my ideal computer, and something I've day dreamed about having since I was a kid.