You can order the older table since it is the same one that is still in use on the Serenity. I ordered it on my 2014 TB that I will take delivery on next Friday. It has a set of sliding brackets on the bottom that allow it to move in both directions laterally and there are screw down knobs that will tighten the position to lock it in place when it is positioned as you want it.
I took a look at mine last week just after it got off the transport truck and that was one of the first things I checked out because I wasn't dead certain I had done the right thing when I ordered this. All I had to go on was the video from 2012 as well.
As it turns out there is quite a bit of room to maneuver around the table when in a travel position and yet not hard to slide around when you need to move it out of the way of the counters/drawers. This is a shot showing how much room you have to get past it to go to the back of the coach:
You can push the table towards the front and then swing it around perpendicular to the position shown here to slide it over to the seat on the left and pretty much anywhere in between. I would likely have it in the perpendicular position and over to the left when preparing food at the counter. You can raise the counter extension and then move the table under it so the table acts as a very large extension of the counter top for food preparation.
The knobs on the bottom allow you to lock it in any position you want it to stay in. It is a bit bigger than I was expecting but should be a very workable arrangement for my wife and I. Not quite sure how well it would work for someone intending to entertain 4 people at a time a lot but that is never going to be the case in my TB.
For the record when I asked about this I referred to it as the older style table from 2012 and the delivery order sheet shows the option as "Install Dinette Table and Base like Serenity #B48103 - production".