Engadget - Like so many things in life, when it comes to high-definition televisions, size matters. So, too, does picture quality -- we like watching the devil in crisp detail, after all. As the centerpiece of home entertainment systems, today's flat big-screen HDTVs pull triple duty. They're the preferred display when you're braining zombies during a flesh-tearing PS3 game of Dead Island. They're ideal for watching zombies (er, walkers) get brained on AMC's hit The Walking Dead. And in terms of social status, big HDTVs serve notice that, yes world, you've arrived. So join us as we explore and demystify the acronym-filled habitat of HDTVs -- and in the process maybe save your bank account from getting bitten.