one thing thats different here,your can adventure and DO THINGS with your SPOUSE! :O
in fable they DO NOTHING! its like X-com your solder's are blank slates,but over time you develop emotional attachments cause of what they do/did cause that defines them. like them have their minds made of snotty tissue paper and they get mind controlled and blow away like 5 of your units. or they make the most unlikely shot in the worlds and they do and save the day! or even better taking 10 shots of plasma fire to the chest and still firing away him/herself screaming "BRING IT ON BITCHES! *cackle*"
if i get married in this game and my wife ADVENTURES with me then memorable moments will be made,she may save your ass so hard your like "oh my god,thank you so much honey! you saved my life,i knew it was a good idea that you and me got together!

" or you have many moments like that and you have the emotional bond then she dies...you tried everything in your power to save her life,but you failed and all you have it the corpse of your once living wife...that cooked for you,cleaned for you,had many adventures with,that you knew that she always watched your back no matter what...
THAT is why it will WORK in Skyrim.because it adds THIS to the game not like fable...in fable when you get married they add nothing,and do nothing, you were better off just marrying that patch of dirt or that rock over there,you know the one with the moss and the unidentifiable brown spot that you wish you knew but didnt know for sure...see in that sentence that ROCK had more too it then the faceless nameless ones in fable.
thats another thing these people in Skyrim HAVE A NAME!
so thats why i think it will work. geez people,this isnt Peter Molyneux here,have some FAITH!