The original iPhone sold 1.3 million units in its first year. I suppose you consider that a massive failure as well?

It's not 2007 anymore. You can't judge a product today with the standards of almost 20 years ago. Additionally, Wikipedia says it sold 6.1 million units within 12.5 months.

	▲	modeless 5 days ago \| parent [-]
		The iPhone was not a completely new consumer device form factor. There was a huge existing market for cellular phones, even smartphones with touchscreens. There is no equivalent pre-existing market for smart glasses today.