The above Guitar Hero World Tour (the official GHIV title) video shows off the new drum set through testimonial from a few rockers – namely, Red Hot Chili Pepper's Chad Smith, Blink 182's Travis Barker and The Police's Stewart Copeland, all of whom are featured prominently (especially Copeland) on Rock Band and a pretty good sign they'll be on World Tour, too.
One interesting detail gleaned from the video is that the drum kit is sensitive to velocity, meaning it can register how hard or soft you hit the pads. We're not shown any gameplay footage so we're not 100% sure how that'll translate to the virtual drumming. All we know is that we can't tell our friends this detail. It's taken us months to teach them not to bang on the set loud enough to wake neighbors six miles away.