I just saw that article but I have read from other sources that it will be TN and 30hz. The price seems too good to be 60 and IPS. That would make it go on sale for around $500. Seems too good to be true.
Well, ASUS is reporting the 60hz on their site, and Dell is announcing the IPS on their site.
I'll eat a shoe if the ASUS, Dell, and Lenovo monitors aren't all sharing the same panel.
So I feel pretty safe saying these $600/$700 monitors are 4K, 60Hz, IPS, and DP/HDMI.