I'd love a bigger/better screen on these, specifically an ultrawide variety. An iMac Pro with an 8k ultrawide would be a near-instant purchase for me. I find the ultrawide form factor so good for productivity. I love the apple "it just works" approach to their hardware, so if something was fully integrated I'd jump on it immediately.
Today I use a 49" CRG9, but the input and connection setup is somewhat finicky. Not a huge blocker, but it would be lovely to be able to simplify.