As a professional illustrator and cartoonist, I whole heartedly disagree.
I own a Cintiq 22HD (and an aging iMac from 2012), and since I picked up the first gen iPad Pro 12.9, all the Cintiq has done is collect dust on my desk.
I work for Mad Magazine, I've done illustrations for record companies and other magazines, I did a Rick and Morty comic book cover last year, countless other illustrations and drawings, all of which were drawn on the iPad Pro and using Procreate. So, if you think you HAVE to use a Cintiq / Computer combo to "do art," then you're not that well adversed in what these iOS apps can do.
Is the Cintiq great? Of course. It's the industry standard...but the iPad Pro is gaining ground, and fast. I posted some of the below in a previous thread, but it bares repeating here--
The most low-cost version of the Cintiq is $800, which is literally just a screen and a pen. You still need a computer to run the damn thing (so add another $1k, minimum) Their biggest Cintiq (32 inch) costs over $3300, and again, you still need a computer to use it.
As a price comparison, the lowest cost version of Wacom’s tablet (the MobileStudio Pro) STARTS at $1500 (and that’s with a current $300 off promotion). The 16-inch model of the MobileStudio Pro, maxed out, is $3,300. Their tablets, no matter the version, only have 512g hard drives.
It also weighs over 4 pounds and has a battery life (of “mixed use,” so less if you’re using battery hungry programs) around 6 hours. The plus side, they have 16g of RAM. BUT, it also has to run a full desktop operating system ON TOP of full desktop apps.
Ultimately, the price point of the iPP is much better than what Wacom has to offer. The gap between desktop apps and iOS apps is closing. What's the advantage of a Wacom these days? Not much, in my opinion.
PERSONALLY, the drawing experience on the iPad Pro is SO MUCH BETTER than on the Cintiq (desktop OR tablet version) - the only thing Apple needs to do to fully kill (or mortally wound) Wacom is allow me to hook up the iPP to the Mac for a Cintiq-like experience (without using a 3rd party app like Astro Pad to do so.) The Apple Pencil is MILES better than any Wacom pen I've ever used.
I still need to run to my iMac or MacBook to do work on Illustrator, but I've become way less attached to Photoshop BECAUSE of great apps like Procreate, which focus solely on the drawing experience for the user.
Long story short: the iPad Pro rules, and I'll never buy another Wacom product again.