"Many tech investors are shifting from investing in bits-driven business (software) into atoms driven businesses (anything you need to manufacture). ... investors are applying tech multiples expectations to these radically different types of businesses. This is unlikely to end well. ...
"If you are merely using software but the business fundamentals have not shifted - than the startup ... will not merit tech multiples. A software-enabled, network connected, crowd funded, smart toaster is, when all is said and done, still just a toaster."*
Birchbox. Soylent. Maybe Uber. You can think of others.
(Uber may be a bubble. They've raised and spent a huge amount of money underselling competitors. It's rumored that only in SF is Uber profitable.)
(Amazon succeeded because they figured out how to do online retail really well. Remember "one click ordering"? (The key to that is not the one-click ordering. It's that the user can easily cancel for a short period after ordering. That makes one-click ordering safe for the user. Most retailers still don't get this.) Then they developed new distribution technology. Amazon has 30,000 Kiva robots and their order pick time is down to 15 minutes at some distribution centers. They're now in the same business Webvan had 15 years ago, but their costs are low enough that it works.)