He has never reported about the displays. Vadim at Max Tech asked him about the potential of a (non-Pro) iMac and he said 'we are not tracking that product'. Could be as simple as he is tracking the iMac Pro but not any future Apple displays.I think you are right. Only the display part I'm not so sure about. If a display announcement was imminent wouldn't Ross Young have heard of it while tracking the iMac with the same panel?
Dylandkt had details regarding the 3 displays. I think all 3 are inevitable this year. Just a question of when Apple introduces them. Personally I think March alongside the new Mac Mini Pro makes total sense. WWDC with the iMac Pro makes less sense to me. September is iPhone/Apple Watch. October is iPad Pro/Mac Pro/MacBook Air.