It's like Sega and Sony all over again. We don't mean the hardware arms race (although that's certainly happening), but how the smartphone world's two top players are now fighting over the most popular games... and their sequels. Gaming is one of the top money-spinning app categories on smartphones and tablets and according to a WSJ report, both Apple and Google are trying to get popular games and their developers on their side. The companies promise headline placement in their respective online stores and prominent ads around the app portal, in exchange for exclusivity, or at least a lead. This was apparently the case for Plants Vs. Zombies 2 last year, where Apple got a two-month lead over the Android version -- and it's not the only one.