Want a Hadoop Appliance? Go Build It Yourself
Microsoft APS follows the route of adding Hadoop -- in this case Microsoft's HDInsight distirbution -- to what is otherwise a database appliance -- in this case Microsoft SQL Server 2014 Parallel Data Warehouse. Want a Hadoop-only deployment? You'll have to use Hortonworks Data Platform for Windows. HP does have suggested hardware configurations for HDP, but if you want a Hadoop appliance, it's probably going to throw HP Vertica Community Edition into the bundle -- just as Pivotal likes to mingle Greenplum with the Pivotal HD Hadoop distribution.
I'm not sure these guys are thinking these things through to scale. Relational databases and Hadoop do work together, but if you're doing a data lake with Hadoop, I'm thinking you're only going to need one rack with RDBMS while the Hadoop cluster is going to potentially grow across many racks. Or maybe you would have a couple of RDBMS racks and a handful for Hadoop. Why intermix on a single rack unless your not likely to move beyond the confines of a single rack? PolyBase connects the two worlds no matter where the clusters might be: on separate racks or even in the cloud on Azure. Opinions?