Exactly.
If I had some spare cash laying around right now (I don't), I'd probably have a setup just like yours, other than the Macbook Pro. I use my iPad Pro for all podcasting now, so I don't need a laptop for that purpose, but I would love to just have a stationary iMac for the couple things where I HAVE to have a Mac and then my 10.5 Pro for the rest of my stuff.
Right now I have a Macbook Air (supplied by my employer) that mostly gets used as my desktop machine, and I only need it for conference call type stuff for work. I would love if they would switch it out with an iMac for me. Maybe next time I'm due for a switch. I have actually never loved laptops, but I am completely infatuated with my iPad Pro.
To be fair I use the MacBook Pro mainly for writing yes I could use my iMac but typing for some reason feels much better on the MacBook Pro and because I do it for hours a day (I'm a writer) it needs to be comfortable, Plus I do play the odd game (old ones like Theme Hospital and so on), however I feel that the iMac is better for editing, the iPad Pro is great for touch editing in iMovie but the iMac is much better for precise editing in Final Cut X. That's why I think each device has its own use, it helps that I'm an Apple fan also I won't deny that