That was one of the questions posed early on Thursday at Glance, a day-long conference in San Francisco devoted to Apple’s (AAPL) first wearable device.

Some benchmarks from my morning notes:

• 80% — Apple’s current share of the smartwatch market
• 21 million —Projected first year sales (estimate by Asymco’s Horace Dediu)
• 100 million —Projected sales by 2017 (estimate by Creative Strategies’ Ben Bajarin)
• 30% —Percentage of Apple Watch buyers who weren’t previously wearing anything on their wrist
• 6.9 seconds —Average Apple Watch interaction (versus 38 seconds on the iPhone)
• 85% —Percentage of Apple Watch owners who say the device has contributed to their health
• 27% —Percentage of Apple Watch owners who say they’ve lost weight
• 82% —Percentage of early adopters who say they have given an Apple Watch as a gift
• 46% —Percentage of Apple Watch owners who have used their nose as an input device

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Disclosure: I was a participant in one of Thursday’s panels.

Follow Philip Elmer-DeWitt on Twitter at @philiped. Read his Apple coverage at fortune.com/ped or subscribe via his RSS feed.

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