How many units does Xbox One need to sell to be considered a success?

[Rafie]

The Xbox One is a great console. It's pacing really well. I don't understand some people's mentality on it (not saying you OP). Funny enough, I didn't even look at the rest of the comments when I voted on the polls. Seems I'm with the consensus. Sales wise...it would have to be between 45-50 mil sold. However, I think the Xbox One is already successful. It's quite an appealing console.