That looks really cool. Is there hardware support for posits anywhere?
I find Gustafson's UNUMS 2.0 more compelling than the first version.
Type 2 unums are pretty much entirely deprecated by type 3 unums (now given the name 'posits' as referred to in the OP's linked paper)... they are basically superior in every way, and I recommend watching John's February 2nd talk at Stanford.