Guru3D is reporting that Thermalright has introduced a new low profile top-down cooler. The heatsink uses a 120x15mm top mounted fan for a total combined height of 67mm. The fan has a maximum speed of 1,800 RPM.
I expect it to beat NH-L12S marginally as the two extra heatpipes cannot contribute much to the cooling as the limiting factor should be the surface area of the cooling fins. And that extra 3mm lower might become important too.
Anyway, its bluish grey colour is going to be preferred over the Noctua's by many people.
I'm glad to see that it fits an Asus Z690-I, without the m.2 heatsink though, since it is probably the motherboard with the worse CPU heatsink compatibility (mostly due to IO shroud, stacked mezzanine board and VRM heatsink).