Finally, Lenovo decided to go with some so called T-shirt sizes with Azure Stack options:
Source: https://azurestackeaiblob.blob.core.windows.net/content-file/Lenovo%20solution%20brief%20-%20Lenovo%20ThinkAgile%20SX%20for%20Microsoft%20Azure%20Stack.pdf?sv=2015-12-11&sr=b&sig=unnEH%2BBAL2cb6UW6UPkmkudRlaA%2FkJEF0NiTA%2BQI%2BR0%3D&st=2017-08-17T20%3A48%3A45Z&se=2017-08-18T20%3A53%3A45Z&sp=r
Additional hardware OEMs will follow (Cisco and Huawei have already been announced) and need to be added in the future. They may also come with different hardware technologies, but the future will show what their design looks like. As of today, from the details mentioned here, you will recognize all work with nearly the same hardware (and even networking) design. We will look into networking a little bit later.