Tech companies are no strangers to the game of follow the leader -- industry imitation is, after all, the sincerest sign of a successful product. In the case of the Galaxy Note, Samsung's phablet wonder has been enjoying some unexpected popularity in markets abroad and even here in the US. But the company's ownership of that once-niche category is about to be contested by a surge of copycats, spearheaded by the stylus-toting LG Optimus Vu ($866 unlocked). It should go without saying: this 5-inch not-a-smartphone, not-yet-a-tablet has a steep climb ahead if