I'm a professional user, not a "wealthy home user", I perform about 150 gigs a year so I am looking for pro features.

Off the top of my head:
- audio time stretching in multi pads
- arpegiators
- DJ FX and transitions
- Synth engine with filters to allow for EDM creation
- Drum mixer with volume, bleed, pan, compression and fx control
- while we are at it some decent acoustic and electronic drum kits
- DMX integration (for light shows)
- Real multiband audio EQ on every channel
- Real compression on every channel
- Decent mastering effects (like Waves L2)
- phantom Mic and upgraded Mic handling

And that's off the top of my head....