The Pro motion isn't a big deal.
It doesn't make content "look" better and mainly benefit pencil users. Video looks better on my three year old OLED Galaxy S6 Edge Plus and on my 3 month old Dell XPS 13 with a 4k touch screen.
I only bought the Pro because my iPad 3 was unusable. For anyone else with a usable iPad, hold off upgrading until the iPad either has a 4k or OLED screen.
Yeah It’s subjective. For me it is desirable for the higher refresh rate which to my eyes yields noticeably smoother animations and scrolling. It’s the buttery scrolling that gives me the impression of a faster device so it matters to me.