Another feature sported by the Alesis Micron that I think really rips for a performance-oriented keyboard:
Pitch Bend affects ALL notes vs Pitch Bend affects only HELD notes
The Micron's Latch button is a lot like the Take 5's Hold button. Usage scenario: I want to make a drone sound by playing B, F#, and B (octave up). Press Hold, then release the Bs. Still holding the F#, I would bend it up or down up to a whole step while the Bs stay constant.