For an OLED panel it kinda is, as they often come with low frequency pwm which gives some people headaches. Usually higher Hz OLEDs generally come with higher frequency pwm.
If it were IPS, then yeah sure 60 Hz would be totally fine.
The hybrid Windows-Android approach can effectively replace your existing laptop and tablet all at once. However, the 2-in-1 Lenovo machine isn't necessarily better than a standalone laptop and standalone tablet in terms of battery life and weight.