In our age of instant gratification, no one likes waiting for anything. That’s why the sluggish launch time of a typical personal computer can make a consumer irritable. It’s also why instant-on computing has become a sort of Holy Grail for hardware and software makers in the industry. The pursuit of instant-on is a quest that’s given Linux traction in an arena that for years it has found a tough nut to crack — the PC. “There’s no question that this is something that people want, particularly as they get to mobile devices,” said Directions on Microsoft’s Michael Cherry.