You haven't listed anything that the car computing community is in dire need of.
Voice recognition is already available and in use. The problem isn't voice, it is the noisy environment of the car.
Power consumption isn't an issue except for those running high end rigs. You can build and operate a car PC on a 60 watt budget if you're careful.
Standby is already possible with the PC and is instantaneous with resume faster than 15 seconds.
A 3D task manager sounds pretty, but most of us use a custom front end and rarely see the UI -certainly not when driving!