The current headsets can make you sick in a variety of ways but since the start of VR, the sick factor has been reduced by roughly half every 5 years or every generation I’ve tried it.
It’s through a combination of higher refresh rates, better tracking, sickness reducers such as limited FOV when moving, or various locomotion techniques for the player.
The largest nausea inducer is giving people a joystick for moving around. But otherwise a 90+hz refresh rate and large FOV solve most issues.
Also, frankly, it takes some getting used to. But once your brain knows what to expect, the sickness goes away pretty quick.
Also I don’t necessarily expect entertainment or games to be the big thing. Many businesses use it for short periods to showcase designs. And VR is walking right now while AR is running.