smart bikes are probably fun and i'm sure the owners will chime in but were it me and my wife road as well i'd be investing in a pair of smart wheel off trainers and hook the bikes up and ride together, side by side. what better way to be with your wife.
recently zwift came out with a killer deal so visit the zwift site. there is sure to be some info there on how to get started. there is a member here that i think rides with his wife side by side but not sure exactly how he hooks it all up.