In order to get service from a Ka band satellite you have to be aimed AT that specific satellite (Spaceway3 located at 95' W.) and within the footprint of one of the "beams" within that satellite. You also would need a ODU (out door unit) and modem that operates with the frequencies being used by that satellite.
In comparison Gen4 users are aimed at Exhostar17 located at 107.1'W and use HT1100 modems and a different "radio" on the dish arm.
I forget at the moment where the final planned orbital location of J2 is but it is not in orbital slot 95'W.
Hughes in the past has offered incentives to switch to new technology and I'm sure they will with this new bird.
The satellite’s entry into service will trigger the start of a recently signed contract with Global Eagle Entertainment (GEE) of Los Angeles, which provides satellite connectivity to business and commercial aircraft.
The GEE deal was Hughes’s first in the fast-growing aeronautical connectivity sector. Hughes President Pradman P. Kaul said Hughes’s aeronautical modem can deliver 200 megabits per second of throughput per aircraft.