If you think that Glass is too nerdy to be successful, consider early perceptions around things like personal computers in general, mobile phones, and Bluetooth headsets. Even wristwatches were once widely thought to be a threat to masculinity. It wasn't until soldiers started strapping their pocket watches to their wrists because it was much more practical than having to remove them from a pocket that wristwatches started to gain acceptance beyond frivolous feminine accessories. Christian Cantrell
A valid point, but I would say it applies more to the rumored smartwatch than to Glass.