32" at 5K and the retina resolution these run at would be perfect - and I have a feeling these new 'pro displays' are going to be just that (bet anyone?

)
I think the default scaling res on a 5K resolution monitor will be the same as the current 27" 5K monitor because that's what Apple deem's 'retina'. (They set it based on pixels rather than size.)
Rather contradictory, no? You keep saying you'd like a larger than 27" 5K, then agree it would never happen. Pretty pointless observation, really.
Apple are not going to do a 32" (or any other size) at 5K for the very reasons stated throughout this thread by every other user (reason: "Retina"), regardless of you repeatedly banging on about personally not liking the text size. They add a solution to increase scaling, and that's your option at the slight cost of processing, that's designed precisely to do that.
Moving on...
If you have the 2016 MBP, then yes getting these 5K's is still a great idea, as they nonetheless have the great image clarity, and Apple are not exactly renowned for their certainty on likely release dates for the new ones they're supposed to be going for. I'd suggest that they won't hit the street (along with the new MP's) until
late 2018.
This is likely, given they've only just
now done this public statement. And given during said statement, where they said they're only now beginning working on a new design, and because of the known technical issues concerned (chips availability, etc.). Even more especially, add to that them saying they're going to only get around to releasing new iMacs in "
late 2017" – they're hardly likely to turn around and then release new MP's only 3-6 months after these new iMacs.
So logically looking at the facts in hand, buying the LG 5K now is still going to give you
18+ months usage on a decently
Mac-integrated 5K display. Though other 5K's may appear (in guessing ~6+ months time), no others released on the market are likely to have the Mac integration either, as the Windows market is much bigger and broader.
Although one has to be slightly peeved that Apple just a few months ago say they're out of the display business, then having a chat with a select band of journo's to quietly tell them they are now going to do a (paraphrasing) '
display solution for the new MP'. But at least they admitted they're dead-end on
pro Mac usage, and are reverting to a more balanced approach, which is a more important outcome for users in the long run.
And finally, given these new Apple displays are apparently going to be aimed "
for the new MP", they're highly likely to be priced at least at the £1200 price of the LG 5K, if not more, given they said they want to offer
pro's an integrated solution.