Forza Motorsport 6 is out now; for a full list of features this link will help.
Club members who have the game:
We already know that Forza Motorsport 6 is coming later this year, and that the new Ford GT is the game's "cover car". Not much is known about the game currently but we should expect a lot of info to some our of E3 later this month.
While the lead platform is Xbox One, there is a small chance/rumour the game will come out on PC too; we'll have to wait on further updates on that one.