Surface 'mini' on early 2014 due to software update ?

Recent news point to the delay of the surface mini to early 2014 due to a upcoming software update

Do you thinks its possible this update is already a the merge of WinRT and WP ? the fact it's called "Spring 2014 GDR" kinda points to something WP related, but i doubt they will put a "pure" WP version on it...

What do you think ?