The problem is twofold. First, you don't have shipping devices. There won't be any games until the devices land. Second, serious 3D games require serious effort, very often manageable only in commercial products, and Maemo devices are not (yet!) ready for large scale introduction commercial products (this is where qgil bites my head off, but that's how the commercial SW developer part of me feels ). With N900 selling like hotcakes and an efficient and functioning Ovi store for it, the picture might change, but until then, don't expect (too) much (just ports basically).