I wish them luck, but... I think split screen on a shmup could get really obnoxious.
I agree. Contra 4 was nearly ruined IMO by the split screen. The separation between the screens makes the eye tend to stay on one screen or the other, it's very difficult to focus on both screens simultaneously.
And Radiant Silvergun had a horizontal monitor configuration, so I'm doubly baffled by this.
Nice idea, but impractical for anything but emulator play IMO. Not that I wouldn't be interested in checking it out