I still prefer using my Laptop in most cases, connect it to a nice big 4K screen at home and the office. I also love my iPad for the usecases it is great at, like taking notes and casual browsing/reading but i would not want to use one device for all. If you do that, a Surface Pro is arguably the better choice.

A lot of apps offer seamless syncing which makes using multiple devices really easy. I can throw PDFs on my iPad via Airdrop, annotate them with the Pencil in Notability and see the changes synced immediately back to my Macbook with Notabilitys icloud sync.