to be fair, the 8k will not not be using standard 'common LCD' but will be using CLPL which are custom designed by pimax to reduce ghosting and increase brightness to make is similar to OLED. you wont be getting the cheaper LCD we all hate with artifacts, ghosting, dull colours and uncrisp edges and below par gamma.
When i queried the panels in a PM to @xunshu asking if the panels were still CLPL as mentioned on their main websie, she confirmed that they were still CLPL and this was confirmed while the M1 was being prepared to send to Beta testers - so i do not think they would of had time to change them.
Personally i would wait, the CLPL seem to have all the benefits of OLED but are LCD lowering the god rays etc.. Customized Low Persistence Liquid displays (CLPL) will i think make its debut on the 8K etc.