The VGT project is a fantastic idea that has been embraced by many auto manufactures. Yes, some of the designs are too futuristic, too unrealistic, too fantastic for many people, but the auto industry has been producing futuristic/unrealistic/fantastic concept cars for decades. We've already seen elements of VGT cars show up in the real world, like the tail lights of the Aston Martin Vulcan and the wheels of the Alpine Celebration.
Aston Martin DP-100 VGT
Aston Martin Vulcan
Alpine VGT Race Mode
Alpine Celebration
We as a community of car lovers, can only hope that more VGT elements will make their way into more real world designs. This collaboration between the virtual and real world is unprecedented, and it speaks to the significance of the Gran Turismo brand. Kaz did not set out to simply design a video game. He desires to bring the real world and the virtual world closer together. He is actively changing the gaming, automotive, and motorsport industries through Gran Turismo and projects like VGT, GT Academy, the SEMA Awards, the Pebble Beach Trophy, and the eventual FIA / Gran Turismo championship.
The unfortunate thing is that GT5 and GT6 both have serious flaws as games (standard cars, poor sound, terrible AI, etc...). Additionally, competition from Forza Motorsport, Project CARS, Assetto Corsa, and others only highlight the areas where GT is lacking as a video game. Delays, poor communication, and poorly executed concepts only make things worse for PD and Gran Turismo, but none of these competitors come close to Gran Turismo as an entity across the gaming, automotive, and motorsport industries.
Yes, more real world cars as paid DLC would be great, but for unknown reasons, PD have chosen to only provide us with free updates. I will never complain about free content. I don't feel that VGT cars are at the expense of real cars in GT6. It is just the fact that PD is holding the real cars for GT7. Let's hope for approximately 700 premium cars in GT7 (~150 new, ~50 standards upgraded).
Ideally a paid DLC car pack would have been released with each VGT. These car pack could have included 3-5 real world models from the VGT manufacturer and served as a means to further celebrate each brand. However, this would have required significant additional modeling resources to be applied to GT6. I think there is still an outside chance of paid DLC to be released after Course Maker and before GT7.
Be glad that there are so many racing games worth playing. Gran Turismo has been an innovator for nearly 20 years, but the competition has caught up and passed GT in many areas. If you don't like VGT, go try something else, but don't waste time complaining about free content that was announced months before GT6 was released.