GT5 will be directly responsible for selling 1.5 million PS3s over time. Why do I say that? I think there are about 1.5 million GT fans from the days of PS1&2 who chose either the 360 or Wii as their console for this generation. Probably most of them the 360 for FM2&3. But not all, because some GT fans would be like Ford vs GM (Holden for the Aussies & Kiwis here) fans and would simply refuse to drive the opposition, those fans would go with the Wii.
Some of those 1.5 million would have sworn off Playstation for good for reasons we all know...but they won't be able to resist the allure of GT5. Most will have simply bided their time playing and enjoying the other less expensive system(s) until PS3 price comes down and GT5 comes out, then they will get on board with PS3. (Face it a GT nut has very little reason to buy a PS3 until GT5 comes out, and I don't think GT5P brought many of them in).
Those 1.5 million won't all buy PS3's at the same time of course, lots will buy in the first 2-3 weeks after GT5 release but many will buy PS3 in their own good time over a longer time period. In the grand scheme of things 1.5 million is impressive for a single game title, but it isn't something that will totally change the fortunes of a console.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
