Here’s a good idea that mixes report writing with Minority Report.
If you have a MacBook Pro, your keyboard has backlighting in dim conditions. In the pursuit of writing odd hacks for every facet of personal computing, a new app called KeySpazz makes your keyboard backlighting respond to key presses. I’m using it now, and I have a cost-effective, bland sensation of having computer touch response. If I drop $2, though, I can have the real thing by learning from this guy, who created an accurate touch interface with blue dye and an iSight.