How does H4 work w/ Smart Glass.

How does Halo 4 work with smart glass. Was that just a tech demo or am I missing something here? I have my Nexus7 connected and Im not seeing anything beyond the controller. Maybe because the Nexus7 isnt supported? I had to side load it…
If anyone knows please tell me. I was looking forward to using this feature.

Trying to figure that out as well I have it on my computer. I put the game in and there is not option for the smartglass thing.