And there's really no substitute for a real, live test drive
Audi is certainly trying to expand the ways its clientele can interact with vehicles in a virtual setting, and Vroom has a "test drive" feature, but with current technologies, a realistic test drive is not something that can be replicated in a VR environment, nor will it be anytime soon. Gazing at animated vehicles in a 3D warehouse is impressive, at least technologically, but it is not, and arguably never will be, the same as putting your tush in the driver’s seat and running through the gears... engaging your entire body and mind in the process. At the end of the day, most customers need to establish an emotional connection with the second largest purchase of their lifetime. Unless that purchase is a Tesla, in which case, sure, why not put down $1,000 on a car you've never seen and wait around a few years.
A car is a big chunk of change -- whether new or used -- so it remains important to inspect the quality of the materials, the ride, and the overall practicality of a vehicle. Assuming you actually care about these things [Editor's Note: You'd better!], the only way that can happen is buying the car through a series of potentially uncomfortable face-to-face interactions... you know, at a non-virtual dealership.