Earlier quoted context omitted.
Yeah, I also want 90hz, but when I need to use HDMI on my fairly recent X1 I must choose between 4k@30hz or 60hz and I would always choose 4k. The banwidth for 4k at 60hz is only now becoming mainstream.
The bandwidth for 4k at 60Hz (HDMI 2.0) has been around for a while. The bandwidth for 4k at 120Hz (HDMI 2.1/Displayport 1.4) is only now becoming mainstream.
That means when I bought my current laptop, still under the 3-year warranty, I would have had to get something worse to get HDMI 2.0 support, since I compared everything available.