Today's Sony PS3 unveiling has opened up a world of questions regarding how Microsoft expects to maintain a competitive edge against a system that will supposedly have more than double the raw processing power, a next-gen media drive (Blu-ray, in this case), two-generation backwards compatibility, and even support for 1080p hi-def.

ENGADGET: & Joystiq's live coverage of Microsoft's Xbox 360 E3 event

Defining next-gen on power terms alone is unhelpful.

FORBES: Epic Games Vice President Mark Rein Calls PS4 'A Really Perfect Gaming PC'

In a parallel development, the PML-N party of former Prime Minister Nawaz Sharif - ousted by Gen Musharraf when he took power in a coup in 1999 - has challenged Mr Musharraf's eligibility to contest elections.

BBC: Pervez Musharraf nomination papers rejected