For what reason(s) are people investing in PS4?

[Aerys]

Veknoid_Outcast said:

Aerys said:

Because people are clever, they bet on the best hardware made by the one with the best support history, you understand what is an investment right ? If nobody invest in it, then nobody will win, games will take much more time to come, you should thank the early buyers, thanks to them, you will have a good library sooner than expected

I'm not so sure about that. Doesn't buying early prove to Sony that it doesn't need to provide great, exclusive games at launch? 

It proves to sony that games will sell better, and more important, it proves to the 3rd party the same thing.