The warning screens are a way for the car stereo (or in this case car PC) manufacturer to cover their rear end in case it is proven in court that the accident was caused by distraction due to the device. In turn, the driver cannot sue the company because the warning screen was explicit. But in states that have laws already, the manufacturer has to do better than placing a warning sign at device startup; a brake signal input or a motion sensor will be required in order for the device to be safe comply with the law. It is a good practice to have this feature(s) available since a recent study pointed out that 90% of car accidents are caused by distracted drivers. Out of that 90% an alarming 60% percent of those distracted drivers were fumbling around with their iPODs, CD's, cell phones, and other consumer electronics gadgetry! So Centrafuse is once again ahead of the front end pack by offering the motion check feature and voice commands recognition. The drivers eyes are keep in the road and his hands are kept at the steering wheel. Entertainment and/or information is requested via voice commands. Who needs a Lexus, a Mercedes, or a Beemer? We can have all those features on our cars without the expense! Well done David.