What metric of success do you use for all the current generation consoles?

[GamingChartzFTW]

 

Squilliam said:

(...)

• How much enjoyment their console(s) bring to them, successful delivery of services.
• How much enjoyment a console brings to others, sales of games/consoles.
• How much money the console manufacturer makes.
• How far a console manufacturer has overcome adversity or improved/fallen between generations.

(...)

^ IMO This.

Also, there will always be some people who enjoy a failed console (Amiga CD32), so I would say that sales/profits is the only indicator of the amount of people being entertained at home AKA Success.