Engadget - What is the optimal size for a modern-day tablet? Is it 10 inches? Is it seven? Or, is it something smaller, like the economy-sized smartphone that is the Galaxy Note? We can't say for sure, but we surely can say that Samsung is as much in the dark as we are. Like a gadgety Goldilocks traipsing between an endless sea of options, that company seems completely unable to make up its mind, splitting niches into sub-niches and then cleaving those in twain again with a seemingly endless array of fractionally different tablets.