No. Trackpad device may be close to keyboard, but Leap is covering your entire working space. I.e. keyboard actually may be completely unplugged and Leap could detect what are you typing.

The fact that a trackpad is closer is one of it's failings. I disable the trackpad on my laptop unless I'm in a space that I can't use a mouse, due primarily to the fact that the trackpad has a bad habit of getting touched or bumped by my hands as I type. If I could shift my hands forward past my keys to gesture up or down to scroll I believe the issue would be negated.

I'd love to see a laptop with one of the leap devices embedded just along to top edge of the keyboard as an alternative to the trackpad.