Mixed opinion there...here's where I see it falling:  
  

 1. General Ubuntu - on-topic   
 2. Future target platform - it's an alpha feature - off-topic

So the real question is "Do we consider an alpha feature planned for 13.04 stable to be on topic because you can download it?"  
  
My opinion is no.  It's not a planned/feature for current stable, and as such it is off-topic.  If it IS on topic, how far does on topic go for alpha features?  
  
I'ld LIKE for it to be on-topic, but I don't see it being productive for the larger audience.  
  
I think maybe we could have a stock question about Nexus7 and Ubuntu that points to an IRC channel as a place to carry on testing discussions about the future in that area.