It should, but I've even seen Microsoft official PR statements put it as a plural instead. It really should just be officially called Windows 10.3; Threshold 1

It should, but I've even seen Microsoft official PR statements put it as a plural instead. It really should just be officially called Windows 10.3; Threshold 1/1507/RTM being 10.0, Threshold 2/1511/November Update being 10.1, Redstone 1/1607/Anniversary Update being 10.2, Redstone 2/1703/Creator's Update being 10.3.