If you think that keyless entry is spiffy, wait until you see it integrated with an iPhone 4. And if it that's not enough, its open architecture will allow keyless entry to your residence, and even a money clip.
Just make sure you don't lose it, or you are (in) S.O.L.
In the pipeline: watch attachment that vibrates when smartphone is 5m away from you and records at what time you parted from it.
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