"Now, Activision and Vicarious Visions are hard at work on the official sequel, an ambitious undertaking that strives to outdo Rock Band in every regard. It's called Guitar Hero World Tour, it comes not only with a guitar, but a microphone and drum set, too. And there's a music mixer program. And downloadable content. And online multiplayer. Guess what? The Wii version includes it all. We chatted with Vicarious Visions' CEO, Karthik Bala, about bringing the groundbreaking title to Wii."