Compared to starting from scratch, which seemed to be the implication, then yeah, I'd say it's a lot easier. And while I admittedly haven't developed for a game setting anyways, I have worked with Unity quite a bit. There has even been some speculation that Unity may support the platform directly as opposed to just being able to use it's existing Linux build support. But yeah, everything is just speculation right now since Atari has been very sparse with actual details.