The post only mentions being able to purchase coins however, so it seems you still won't be able to directly spend on specific pieces of content. There's no mention of rewards for microtransaction enthusiasts though, so players that ignore the option won't miss out on any game-changing unlocks.
The option to buy pretend money with real money follows February's confirmation from PopCap's Brian Lindley that microtransactions wouldn't be in Garden Warfare at launch. At the time, Lindley added that PopCap would be using in-game metrics to decide where to take Garden Warfare after its initial weeks on the battlefield.
Plants vs Zombies: Garden Warfare (Gamescom 2013)