Apple, Samsung and Google are all rumored to be working on smartwatches. With all the buzz about these devices, it's hard to see the real use cases through the hype. Here are nine things we think any smartwatch worth its salt (and silicon) needs.
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4. They can't be too heavy.
The size of the watch, on the other hand, is another issue. Large, flat watches have worked as a fashion accessory for some time now. In fact, a flat display that covers a fair part of the forearm might well be quite useful given that...