> So games are limited in what kind of gameplay they can offer

I disagree. Games will have limitations. Limitations constrain but foster creativity. Console games were already limited in so many ways yet people found amazing ways to make them fun as hell. When mobile games come I truly believed that nobody would be able to have fun there, yesterday I played the entire game of League of Legends retrofited for mobile and it works! So now VR gaming is great, people will find ways to make it even greater without free movement that makes you sick