I've been an off and on iPad user since the OG iPad was released (iPad, iPad mini, ipad mini 2, iPad Pro 9.7). Even with all of the speed and resolution increases over the various iterations, my original thoughts about the iPad are largely unchanged. It doesn't do everything a laptop/desktop does, but it does 70% of those things very well. I use my iPad for work purposes (I'm and emergency management director in a rural community) and pair with a few special apps, it's a great tool. I sold a Surface Pro 3 to buy my iPad pro and I don't regret it at all. My only complaint is that Apple's walled -garden ecosystem makes some things harder than they should be (i.e. moving files between devices, printing only to Airprint-compatible devices, proprietary charging cables), but when you get a set-up that works, it is a seamless experience. Apple makes consistently great devices and supports them with tightly controlled, but excellent software.
I completely agree with everything that has been said but I look at this from a slightly different perspective. I have had MS for over 40 years now. I say this as I type with one hand on the virtual keyboard. I replaced my !st generation iPad Air with the 12.9 inch iPad Pro. 70% is about right. I do quite a bit on Ancestry.com. My family's tree has now expanded to over 1,200 people which chooked my 1st gen iPad. I am now able to move and edit close to MacBook Pro speeds. As the battery runs low on my MacBook Pro I will seamlessly switch to my iPad Pro. I both now keeping me free of cords. At times I have my MacBook Pro and iPad Pro side by side.
Charging time for the iPad Pro without the USB-C adapter and cable is my only complaint. Using the charger that shipped with the iPad Pro is a bit of a joke.
Rich