Because not everyone races cars for a living.
Nobody knows what the new Ford GT is like to drive. Heck, its interior design reportedly hasn't even been finalized. And considering that very few people will actually be able to own, let alone drive one, virtual reality is going to be the best solution. Yep, that'd be Forza Motorsport 6, which will officially be released next week on September 15. But you don't have to wait until then to get a preview: the launch trailer was recently posted online and it looks insanely awesome.
Don't know about any of you, but we're anxious to race a Lamborghini Veneno against the Ford GT. A Ferrari 458 Speciale? Oh yeah, it'll be there too.