I just saw this and thought it was a CGI fake, but it's for real. Already christened, launched, tested, and being commissioned in mid-October: http://usszumwalt.org/ship/
This stealthy, slab-sided (remember the Sea Shadow?) ship makes big promises and has every modern technical marvel on board, including RAIL GUNS. Any Propellers on board? Hate to think of our National Security powered by Arduino or Windows 10 tech!