Google|Walmart deal is missing a Billion-Dollar media budget.
There are a few pieces of the partnership that are either undisclosed or have a very low probability of success (Wired, really?). As Google seemed to control the public messaging, my thesis is the latter for two main reasons.
Google Express has little volume.
It's nearly a restart. And, of their original retailers, 70%+ of SKUs came from Walgreens.
IF Google advertises Google Express and/or Walmart heavily via Adwords in ways that are not being disclosed here, then it will generate some volume. I don't see how else it can get to volume.
To execute on that promotion at sufficient scale, Google would have to risk their earnings. There may be an undisclosed billion-dollar Walmart media budget within the partnership, but I don't see how they could avoid disclosing it.
Wherever the ad budget (if any) comes from, Google ads could generate some level of profitable business but there's no way to know up front if it would be large enough for the partnership to succeed. Competitive response, which would lower Return on Ad Spend, from Amazon-WholeFoods, Aldi, etc. is also a significant factor.
if Google invests in the type and scale of promotion noted above, it's going to upset a significant number of their advertisers. Those advertisers have effectively nowhere to go to find equivalent promotion, but they will seek other solutions anyway, including possibly regulatory solutions. Facebook ads works differently for CPG/grocery and advertising on Amazon is no solution for CPG/grocery marketers. Those are the only platforms of significance in the English-speaking world.
Google's voice services do not to have any shopping volume either.
I can't say for sure, but it appears they are starting from scratch on that segment. So it is a completely ad-dependent situation again. And in a nascent segment where there's a ton of noise AND they are a distant #2 to Alexa, breaking through will be difficult. Additional competitive issues Google will need to contend with on voice are:
Facebook Messenger is a far better place to start from than Google Home and OK Google for shopping and they are putting a great team on it. http://www.businessinsider.com/facebooks-andrew-bosworth-to-lead-oculus-building-8-aloha-video-chat-device-details-2017-8?op=1
FB's video chat device is a kitchen counter appliance. I would expect a partnership with with Kroger or even a parallel partnership one with Walmart.
Alexa can be attached to whole foods/Instacart in no time if they haven't almost finished already. Instacart will agree to such a deal even though it is medium-term suicide. Relatedly, the revenue and profitability of the Amazon Ad Platform are not disclosed and easy to fudge.
The programmatic APIs for Siri are supposed to be expanding in a serious way later this calendar year.
Aldi is too smart not to have some sort of digital plan for their US market entry.