So, perhaps I misread Tim Sweeney's point of view, but it seems like it starts and ends with "put cool car in metaverse, drive it down Main St., everyone stops and stares, like that one scene from Snow Crash. Or Ready Player One."
If it's more specific than that, "put cool car in video game, in metaverse" product placement, well we already have that today. Mercedes Benz already did a whole Mario Kart thing [0], and countless other racing games like the Forza series have sponsorships from real car companies. So that's not really anything novel for the metaverse, it's just the same product placement marketing strategy that's already existed. Tim Sweeney is basically saying "hey, look, this is the future, you can put your car in a video game" to Mercedes, who has already been doing this for years.
> By this logic it's pointless to make a website to promote your car because you can't test the car by visiting the website.
Pretty much all of these websites have a call-to-action for "Schedule a test drive at your local dealership". Hell, I remember an entire campaign from a major car corporation that was to the tune of "anybody can watch a TV commercial, but driving it is believing"
[0] https://www.theverge.com/2014/5/29/5760538/drive-a-mercedes-...