The OLED seems to be more of a power consumption upgrade. The resolution is the same. Sure you will get more color depth with the OLED but it probably isn’t worth the upgrade if you already have a deck. If they offer the new screen as an after market upgrade that may be worth it. But I’m the meantime the deck HD has a higher resolution.
The only people that want apple to open up iMessage are apple fanbois that are too cheap to buy an iPhone. Everyone else just wants apple to support rcs. It’s a better standard anyway.