Both Unity and Unreal have demo scenes that you can modify to suit your needs. I can't think of any demo projects that would specifically suit your need; it depends on what type of 3D capture technology you're using. Leap Motion for instance has demo Unity scenes that may be useful.
MSI, Asus, and Razer are the primary OEMs in the VR laptop game; I would recommend getting one with a 1060 (not a 1060m) or 1070 as a minimum.
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