Those issues will be resolved by a side effect of this being a government order. According to the GAO, on average it takes 4 1/2 years from the time the government orders a computer until it's installed. Right now, multiple government agencies have been told to start thinking about a plan. In two years (2017), each agency will have their plan and they'll start working to to resolve the differences between agencies. In another year (2018), they'll put out some RFPs. Those will go through the federal procurement process and the order will be placed about two years later (2020). That's when the 4 1/2 year average clock starts, so expect installation around first quarter 2025.
The goal is that it should be 30 times faster than TODAY'S computers.
And be operational in ten years. They can pretty much just order a Nexus 47, or an HP Proliant gen 12.