Everyone knew they were going to, but don't get too excited. The new 6 speed in the GC and Durango is essentially the same as the 5 speed with a new name and slightly different programming.
The 5 speed auto isn't really a 5 speed, it's a 6 speed, with an alternate gear for kickdowns that isn't normally accessible (only on kickdowns). The new 6 speed has all the same ratios, except now you can access that extra kickdown gear using the manual shift mode.
So it's still going to be horribly slow for that much power unless they significantly reduced the torque management on it. I'm sure in time the aftermarket will crack it, but the question will be if they'l crack the 6 speed or the 5 speed, and if such a crack would work for both.