Big retailers don't do well in this type of online marketplace. Target and Toys"R"Us already tried partnering with Amazon and both deals failed [1][2].

Google should start developing warehouse technology and a delivery network in order to start competing directly with Amazon. Their current strategy is just a coat of paint on declining businesses.

[1] https://www.wsj.com/articles/SB100017752821017751 [2] https://www.wsj.com/articles/SB113798030922653260