And in a lot of places, it'll come for free with the phone. I know Fi is doing it, and I think Verizon might too. I know friends that got Gear VR for free along with their Samsung phones.
I imagine the novelty wears off pretty fast, but the wow factor for first time users is pretty awesome. I would say just taking it to work/friends and sharing that experience makes it more worthwhile and also aids the VR cause! :)
A valid question. I used cardboard once. I stopped using it as I got dizzy, and secondly my wife took a photo of me whilst I was using it and it became obvious that I looked completely ridiculous.
At least with other game forms and controllers (eg xbox/playstation/even Nintendo chuck) you don't look completely ridiculous using them.