The X1 will not be able to do both E and W as the X2 can. It will be substantially smaller than the X2 but it cannot do quite as much. It will have a smaller internal antenna and it also will also cost about $50 more than the X2. Very small, however, and should still make a really nice compact portable.
There will also be a new antenna in the same housing that will replace the Winegard Carryout. It will work for DirecTV or Dish without the 211K/Z limitation and can be used as a Carryout, roof mount or installed on the ladder rack. The X1 and the new Carryout out (Mini Carryout?) is about 14" wide and a bit over 14" tall.