James, you have so many choices here. Perhaps you might want to share some of your specifics/habits and such
Do you prefer typing on the screen or a real keyboard?
Do you share data between your present iPad and any other device, computer or...?
Questions like these might help others who want to help you. I suppose the question remains whether you need
anything greater than IOS to do the tasks you want. Also, would specific ports be handy such as HDMI or other types of display, and then there is USB3 etc.
Might I suggest you do a little exercise and compare an iPad Pro to something akin to the Microsoft Surface Tablets. What they both have in common is touch screen with ability to add a physical keyboard. From there, - quite a difference of features. I suggest this contrast and compare because if you like to walk around with your present iPad and use it on the fly, a laptop will feel very restrictive in that venue. I on the other hand prefer laptops but never put down how useful an iPad/tablet can be.