I can tell from the design that I will never wear those ear buds. There is no way to create a decent seal in the ear using just hard plastic, so the sound will suffer for music, and that's the main reason I buy earbuds.
I'm not a snob about music stuff, but for around 100 USD I get a decent pair of earbuds that create a proper seal and gives me good music quality. I'd love the features, but I'm not going to sacrifice the main reason I use in-ear headphones in the first place - the ability to relatively cheaply have good quality sound.
When I'm out and about I have to balance sound quality with not getting hit by a bus. For me anything I wear outside needs to let in outside noise.
I haven't tried them outside, the sound of an approaching car seems like something they would filter out but they might have some smarts to them.
One important difference besides the fit, is that earphones are more sound-isolating as well, allowing you to listen at lower volumes and save some of your hearing.
I would imagine they have a standard manufacturer's warranty, and if you have a decent credit card, that warranty is usually extended.
Does warranty covers broken hardware? If you step on these buds, is google going to replace them?
Obviously it's better to have 90 days of accidental damage protection than to have none, but my wired earbuds are a couple of years old and would cost maybe $20 to replace with another decent pair.
Ideally, what I'd like to see to make myself, and I'm sure some others, a buyer is a free replacement program. I'm more than willing to support awesome software if I don't have to worry about it's backing hardware breaking so easily, especially something a lot of folks jam in their pockets.