I havent seen a pullout in the rear of the trailer before...
It's generally the bed that pulls out when it's that configuration. It's really a great feature.
I was looking at TT's recently and one of the Jayco's had this option and it made a 19' trailer seem MUCH larger.
Yeah most the time... When I worked for Coachmen some of the pullouts were the entire kitchen including: fridge, stove, sink and all the cupboards.. The big fifth wheel trailers usually had 2 or three pullouts...
Makes a ton of extra space..

) and had to drive back very tired with no $$ for a hotel, we had no choice but to stop and sleep in our cars. I wish I had the burban back then...