Forecast AI is similar to a XATA phased progression using a TED but not limited to a 120-day period. Focus Duration and Specificity for an event are also configured by running the Setup Guide wizard.
One HUGE difference is the forecast plan populates the Planner to satisfy those who are lost without a plan to view. That includes a number of Xert trial users who couldn’t accept the premise XATA runs in background to guide you along the way. No need to plot more than a week at a time, if at all. Those of us who accepted that principle learned it works better than a pre-populated calendar plan. Others prefer to see where they are going.
Forecast AI gives you the best of both worlds. The calendar gets populated but you still control day-to-day selections and changes. IOW a flex plan (dry-erase board) that you can modify as desired and adapt forward as needed. Or recast at any time.
Another benefit is the XPMC chart displays the results of the forecast. It’s easy to compare your past progressions to the forecast.
Other features such as a defined weekly schedule are highlighted in the announcement post.
So yes, a game changer for those who prefer a calendar view over day-to-day guidelines.
And for those who like to experiment. 
YMMV