I'm offering some business advise to Sonar, Cakewalk and Roland...
Don't neglect staff view! Right now there is blood in the water. Avid/Protools/Sibelius are in trouble. Sonar can definelty cut into Protools market share. Staff view can be a crushing blow to this.
If Sonar had a killer staff view on top of all the great things it already does, you'd have the top film scorers, composers and schools flocking to Sonar. The film guys and composers would have a true trickle down effect. Schools would generate generations of Sonar users.
If staff view is not a big $$ generator think of it as a lost leader.
The thing is, business and technology cycle. Someday Sonar will be threatened by some new advancement or changes.
Staff and music notation will always exist as a way to comunicate to musicians....it can and will be the bridge to whatever comes next.