Sony isnt MS. They sell a product to make a profit. They cant afford making such HUGE losses in a such a long term period and not care.
Unless those 6B$ generate (eg) 6B in HDTVs and 6B in BR rights, or even 3,75B for each (if you see Sonys past they usually dont generate much proffit, %wise (eg PS2 had a proffit of 1,5% till now, more or less 1,5B IIRC)).
Its not unknown if he used the software sales in his analysis because simply there is no data available yet that can develop a valid analysis based on this variable. There is nothing in existence that shows the behaviour of the demand on sofware sales because the console just got released. Sofware sales havent even started
If people had date they wouldnt need analysts.
Anyway most people are looking in a straight line into this analysis, just because his reasons arent evident that dont mean he is not right (even I, Powderkeg and others already gave a few possibilitys) and considering how much this guys are paid I would give them the benefict of doubt anyway.
Still only the future will tell.