It all depends on what you use a laptop for and what you want the iPad to do. If you are talking about an iPad vs laptop-as-desktop-replacement then probably not, but if you are talking iPad vs laptop-as-meeting-and-travel-device then perhaps.
I use a desktop computer at work and an iPad for working away from my desk and for taking notes and accessing information in meetings. We are a Microsoft Office 365 shop, and there are apps for just about anything I need to do in Office 365. I can access and edit my cloud-based documents and spreadsheets, email, OneNote, tasks, Office 365 groups, etc. My employer offered to buy me a laptop (like the Surface Pro) this year, but I opted to upgrade to the 9.7 iPad Pro instead. I use iOS as a general productivity and communication platform, so the iPad just feels like it completes the system I have going with my iPhone and Apple Watch. My Windows 10 desktop computer is more of a specialty system for more intensive content creation and multi-tasking. That said I'm able to do more and more from the iPad all the time. My need for a full desktop OS is less now than it was a few years ago. I still wouldn't want to work from an iPad all the time, but when I'm not at my desk there is very little I can't accomplish when using it. And for those few things I can remote into my Windows desktop in a pinch.
You need to make a list of what you need to be able to do, and then for each item you need to ask yourself if 1) You can do it from the iPad, and 2) Will you enjoy doing it from the iPad or would it be easier from a Macbook or Windows laptop?
Sean