The arm on the new Traveler table is completely different from any other VPI arm. All of the VPI arms to date have been unipivot designs. The Traveler arm is a gimballed bearing design. The cartridges that worked on the unipivots "might" not work as well on this design.
We will have to wait until the table is released and owners have a chance to try different carts on it. I'm sure it will work well with most cartridges, but you never know...