One of the wrist
watch/phone/tablet/wearable computy things must be in with a chance.
Considering the length of time there have been rumours of an Appoo wrist job, perhaps MS have thought about it and produced something functional and then held on to it until Appoo's announcement had been made, there is usually a fairly long lead time between an Appoo announcement and market reality so MS would know they can step in early before actual release and attempt to trump the limpwristed roundy cornered item.
If I was a marketing person for MS I would be tempted in that direction.