Personally, I thought it'd be uncomfortable typing on a tabletop with no tactile feedback, but I admit the idea sounds cool :) If you get one, will you please report back and let us know how it is?
As HN has an odd 14-day limit for threads, where should I write?
You can start a new "show HN" post and talk about it (only if you'd like!) No pressure, it's not a big deal either way, just thought it'd be interesting to share :)