It appears Android tablets aren't the only ones getting the boot over at Dell. The PC maker has just revealed that it is putting to rest the rather young gaming PC line that brought it much attention in the past years. After just four years, the Alienware X51 is being put to pasture. Dell naturally gives no reason in its eulogy for its demise, only that it was time to pass on the baton. To whom? To two PCs that couldn't be any more different from the X51.