The two reasons the rMB failed is it only had one port and was too expensive for its market.
it was outsold even by the 11 inch MBA with its lousy screen, and from the top of the 13 inch MBA sales tower, the rMB sales pile was barely visible, an ant viewed from the top of Everest.
this size screen would probably fit these days in a form factor of similar size to the 11 inch MBA, so interesting. What I fear though, is it will like the rMB be port crippled and with an OLED screen, have a market destroying price.