treat the 13" ipadpro like a desktop companion and your opinion may change..... I love using mine in conjunction with a desktop [or RMBP with display]. Perfect combo. I design for a living. I agree though, no way is it a computer replacement for me yet and won't be for a while.
Actually I have a similar setup. A desktop computer along with a iPad Air 2. I don't draw, but day-to-day tasks like notes, short e-mails, calls, stream music to my audio setups and just browse. There is still a lot the iPad Pro can't do good, like editing RAW files from larger cameras. When 5G arrives and cloud computing becomes reliable and affordable, I think the iPads computing power will be challenging the use of laptops. I love the idea of using a single device with cellular access built in for all my tasks.
Gestures outsmart the mouse and keyboard in most cases except for typing. The full screen apps help you focus on a single app at a time though can't replace a multiple screen setup with large datasets, long pages of code and a preview/test window. Take a look at what kind of type of computer people are using in the chart below. The demand for desktops have been stable since the new millennium. Laptops has been trumped by tablets for the last five years. Not only taking a share, but growing as a whole. Actually doubling the amount of computers being bought globally.
Professionals are usually the last people to embrace change. As long as they are convinced desktops and laptops will be a part of the process in work, keyboard and mouse will rule business. Locale storage has to be rendered irrelevant first. I would rather invest in iCloud storage than iPad gigabytes. iCloud caters to all my devices cross-platform. Try doing that with 256GB iPad storage alone. Again access to Internet along with speed and security is really what is stopping a positive development among pro users adapting tablets. Processing power and connectivity are minor concerns in comparison.
Why man?? Why you get rid of your macbook?? It is the most beautiful mac/laptop
As a single device for all round light work it is great, but owning two legacy computers (keyboard and mouse) means twice the maintenance. More backups, more settings and less time. The iPad requires zero maintenance. You set it up and it flies. Everything is in the cloud and cellular connectivity removes the requirement of having a modem with me or hunting down free wifi. I seldom get the time to do serious work on the road. I just end up jotting down comments on existing work or sketch new ideas quickly down. My business address isn't the nearest StarBucks.
I have tried writing serious code in cafes, and the result is just average and leaves me with more debugging when I get to my desktop. Better to just comment fields of code and ideas, then do everything in a single sit-down at home or the office.