I am voting no. Here is why.
First off - I have the utmost respect for what Solar and Camo did with the soda machine. It was the right thing at the right time, and like I stated before, hats off to you gentlemen.
But, basically, idealism and reality do not go hand in hand.
As ddlink mentioned, to close the loop and people not cash out Dash for FIAT, we need to create an ecosystem large enough to support Maslow's Hierarchy of Needs theorem - which is basically factual evidence in today's society - that I here apply to Dash.
https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs Until you can pay for food, rent, clothing, healthcare, etc etc with Dash, you can never close the loop.
While I totally applaud the effort, no one will use these vending machines with Dash. They may use the blockchain and Apple Pay or NFC, but never Dash. Why? 'Cos you have to buy Dash to spend Dash.
The DGbB system will only be a victory if we think strategically on what are the basic necessities that Dash has, to build the first "floor" of this pyramid. You may ask "hey, isnt vending machines providing food and drink" ?
Yes... but the vendor must then pay for distribution of soda's with Dash, distributers need to pay wharehouses with Dash, pay for suppliers with Dash, drink producers must pay raw materials with Dash, and agriculture must pay for seeds, water, fodder and farmers with Dash, who in turn pay rent, food etc etc.
So while I totally get how this is indeed a very cool project, I consider it a waste of valuable resources for, essencially, something that has no ground to stand on, and can be developed posteriorly very very very quickly.
Essentially, I just think it is too early for this. The first merchant adopters will be Service Providers, where no physical goods are produced.