I think you are right. It is a good successor to the FJ. I love it's looks!
It wouldn't be what I want because it is too big. The TJ would be a better fit for me. I am pretty certain that the TJ will be produced in Japan for that market. Whether it makes it here is an open question.
The automotive writers seem to think this is a foretelling of the next RAV4 in styling. It may come as an Adventure option like this one-off.
I notice there are no door handles or interior shots, which to me says it is just an exercise. Maybe the show will reveal more?