We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
When I logged into my Xbox (which downloaded the update automatically since I use the Instant On functionality) there was a notification showing that the update was downloaded and ready to launch.
An easy way to check in the game is by checking the prices of the expensive cars. For example, if the '62 Ferrari GTO is still 6 million credits - then the update hasn't been applied. If the price of that car is down to 1.8 million - you've got the update.