Via Japan Media Review, a short list of things a cell phone cannot do nowadays:

1. Adjusting according to the atmosphere We wish cell phones could detect the atmosphere and adjust to it, in cases such as lectures, wedding ceremonies and funerals. There are always people who forget to turn off cell phones. It would be very convenient if the cell phone detected the formal occasions, and switched to voice mail automatically.

2. Recharge-free Our biggest fears regarding cell phones are no-reception places and a dead battery. We look forward to the day when we get power in the same way as we receive reception.

3. Responding to an owner's mood Since it is always with us, it would be nice if a cell phone responded to our moods; for instance, by trying to cheer us up when we felt sad.