Okay, first idea has already been done, in the new cadilacs i think. Front lights that turn when the streering wheel does. I really like this idea, and was thinking about doing something like this for years, but couldnt think of a way to do it that would be 100% reliable, or in the case something did go wrong, could somehow revert to a fail safe default position. Im Still not sure how the pc could 'sense' the turning of the car, but if someone could possibly do this, it could really improve the visability of driving on whindy roads, and would just be overall safer then not having this feature.
Second, Finger scanning security. Now i know a lot of people have said that it wouldnt be worth while, but i think it would, and could be if they just thought about implimenting it in different ways. Like, instead of using a full computer to do it, you could get a very very small computer, thats only task was to scan your prints and verify your id. This could work, because the computer wouldnt need to take as much power as a full pc, or even mini-itx pc, and could stay on all the time without killing the battery. ( okay, i dont mean all the time as in, weeks at a time, but certainly days) Plus it would be very inexpensive. The gumstick looks like a good option for this ( lower part of the page @ http://www.mini-itx.com )
Third, which kinda adds/replaces the whole security thing. Other ways of I.D.ing the owner of the car is actually him/her. Well, if you didnt want to implement something like a finger scanning system (i would think it would be kind of hard to code something like that) you could use different means of I.D.ing yourself. Like say, by weight or height. I would think the wieght would be the easiest to code, put some sort of wieght measuring device inside the seat, under the cussion (so no one could feel it underneath them) and preprogram a set of parameters that would be close to your wieght. Im not sure what the correct term is, but i would make some sort of soft set of instructions. Something that would know exactly how much you weigh, then it would allow 2lb's above or below that actual wiegh, just incase you have heavy things in your pockets or whatnot. Also, it would wiegh you each time dynamically learn how much you wiegh, so overtime if dont rapidly gain or lose weight, it would start your car without being reprogramed.
Fourth is for all those people that ride your *** when youre on the road. I was thinking about installing a--think its called hyper sonic speaker, behind my license plate. It would be hooked up to a microphone in my car somewhere, and at the press of a button it would flip up the plate revealing a speaker in which you could talk to the person behind you. This way other people couldnt hear you yelling, or speaking nicely, to the person behind you. Also, it wouldnt be dangerous as brake checking them, and it would get your point accross a lot clearer then that.
Fifth is just for cosmetics, and im actually gonna do this one when my pc is built and installed in my car. I was thinking of having two displays, a cheap touchscreen monitor that would replace my deck and would be used to control everything except the GPS. Then i would have a hidden monitor on molded into the dash itself. I was thinking of cutting a piece out in the middle of the dash. I would then have that as the cover/back of the second monitor that i would used for GPS and gaming or whatnot. This monitor would flip 360...or acutally more like 180 or 200 revealing the monitor to the people in the car, but wouldnt be visible when it was in its default position. I saw something like this done on ' pimp my ride' but it was on the arm rest, and it was for a phone holder. They did it with air pumps that would make a peice of the armrest spin revealing a phone holder.
So yeah, there are my ideas, i have a few more, but this post is already becoming too long, if anyone thinks they are good please post, or even if you think they are stupid, give me some feed back on if they could be done.