Samsung has unveiled a computerized wristwatch that can do more without a smartphone to go with it, while LG has one with a round design.
Thursday's announcements come as technology companies prepare for the holiday shopping season. Smartwatches are another product they can offer since many people already have smartphones and tablet computers. But companies have yet to make a strong case for why everyday consumers need one, especially when so far smartwatches have had little functionality without a phone nearby.
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But Samsung's new Gear S will have 3G cellular connectivity so that it won't need that phone.
LG, meanwhile, is unveiling the G Watch R with a circular screen. Previous smartwatches had a rectangular design.