Tomorrow will be the first day of revenue service for the new LRT cars, including the new seating arrangement. For now, just one train will be in service on weekdays and weekends. I believe it will serve the 201 - South/Northwest line. We will see more coming online though over the next few months as new cars arrive, are prepared, tested, and commissioned, and drivers are trained.
For those who don't remember from the first page, this is what they will look like.
Exterior:
New Seating Arrangement:
Video: