[ryandrake]

Not just the fluidity of the gestures, but the overall resolution and responsiveness of the device. If I had to pick my top requirements for a trackpad, I'd pick:

1. Latency: If I drag my finger back and forth across the trackpad, I expect the mouse to match exactly where my finger is--not where it was 50+ms ago.

2. Resolution/Acceleration: I expect to be able to navigate my entire screen without lifting my finger and repositioning it. Further, I expect to be able to move the mouse one pixel by making a very small move on the trackpad (or by rolling my finger a little).

After those "table stakes" items are solved, then let's talk about adding gestures.