It's hard to believe that Sony's venerable first portable has just reached its seventh birthday. The PSP launched in 2004: a year when the Motorola RAZR V3 claimed top phone prizes and tablets were called tablet PCs. Since then, its closest rival has undergone several substantial transformations, but the PSP has remained largely untouched, aside from getting a little slimmer. Sony's hoping its new portable superstar is less evolutionary, more revolutionary. And it may have to be. Mobile gaming is
