Sky is huge in the uk and is pretty big in eu, they should be on to them.
Sky wouldn't be a partner, they'd be a competitor, they are creating their own TV ecosystem.
The sky Boxes don't feature HDMI-CEC so that's out of the question for now, regarding the IR Blaster, sure they could get that working, But I don't think Sky would help, the Sky Remote is desiged to be the only remote you need as it has intergrated TV controls as well(which actually coincidently can be used with the PS3 slim, or maybe just super slim, I forget depending on your TV)
Sky have also created there own on demand ecosystem, featuring the back catalog from Sky channels but also Iplayer 4od itvplayer and 5 on demand, of course these will likely feature on the XB1 too behind the paywll, but sky want people using them through the sky box.
I can't see Sky handing the key's to their kingdom over so easily.
EDIT: also reports are sky walked away from deeper discussions with them, originally it was claimed microsoft wanted to subsidise as a second sky box but Sky were not interested:
http://tech.uk.msn.com/news/articles.aspx?cp-documentid=255639568