I'm looking forward to these. There is defiantly a place in the market for something like this, and judging by the technical spec, a lot of thought has gone into it. I can see myself using a bunch of these for cold storage, and then getting something with a screen & NFC for regular use.
Hope they don't melt too easily, for use in a fire safe.

Thanks, yes, I think that there's definitely some market share to grab for cheap & secure products
NFC will very likely be available in a future version as we upgrade our generic card platform, and regarding fire resistance, you only care about the chip which should follow ISO 7816-1 guidelines (so basically fine up to 70 degrees celsius for limited periods of time)
Also, a video that shows how the second factor works in a sample KryptoKit integration is available at
http://www.hardwarewallet.com/video.html (webm, so Chrome recommended)