Sony are hardly likely to fund every single wannabe developer out there. If you have an idea, it's your responsibility to finance it's production. You can approach Sony as any other publisher to fund it's development. The point about these distribution isn't paying for every person who wants to give game development a go, but elliminating the costly production overhead that is extremely prohibitive. Now you just have to fund the game, instead of funding game+printing+license fees, and with (presumably) no upfront fees to Sony, the cost to develop is much reduced. If you have an idea for something in LocoRoco's vein, simple graphics producable by a few guys working from a home office, that can be a real game with real returns over online distro, whereas you'd need a publisher to fund a disc-based creation.