Happy Tuesday, everyone. It's that part of the week where you already feel a bit tired but can't yet use the "it's all downhill from here" mantra. You know what I mean, right? Let's go to a more positive note with today's top tech stories - Apple rumored to use Retina display in next iMac. That's certain to please a lot of Apple fans, not that they need much pleasing because - Apple grabs top spot in US customer satisfaction rankings. And speaking of cool things - NASA's next course: asteroids.