The laptop in question was running a Kinetic SBS virtual radar box, the hardware comes in a modem sized box connected by USB to any windows computer, it costs about £400.
Alternatively you can download this software called planeplotter, it allows access to a website which hosts uploaded sbs data from users around the world
PlanePlotter from COAA
The drawback to this software is that it will only show aircraft that are plotting full information, a very large portion of aircraft (military, biz jets, emb types) dont transpond lat long info so will not plot. The SBS box receives these aircraft and displays in list form.