An iPad is far more portable than a laptop. Once opened, a laptop is much larger and more unweildy than an iPad, especially if you need to use it hand-held. In certain situations, such as being out in the field and needing to get specific content online fast, the iPad beats any laptop hands-down. I use my iPad while out in the ocean, and I can simply unzip my bag, pull it out and immediately get to work in less than 10 seconds. An iPad is much easier to use hand-held and probably much more durable overall than a Macbook.
If you've used LumaFusion for video editing, then you would know that it is essentially a desktop-level application. Affinity Photo and Designer are also the very same versions as the desktop applications.