Is the future of mobile social games cross platform play?

Recent headlines certainly suggest that mobile games will be developed for multiple mobile devices at once. OpenFeint creator Aurora Feint announced today that its mobile social network for games will soon support play across several mobile operating systems, VentureBeat reports. The service, known as OpenFeint Connect, will allow iOS, Android, Windows Phone 7, and Palm Pre devices to play games with one another. Coincidentally (yeah, right) Game Closure, a Palo Alto, Calif.--based start up, has launched a service of the same name, according to TechCrunch. It allows developers to create HTML5-based games and release them on several mobile devices at once through their respective mobile browsers. Is this where social games are headed on mobile devices?