Astro Bot winning GOTY is not a decision I'm informed on that much, I don't even know what the other contenders are and my only hot Astro Bot take is "Toro better", but I will say that I think it is GREAT news as a scrimblo-area Nintendo fan specifically, if Sony keeps up the momentum, whether that's with Astro or scrimblos in general, Nintendo could be facing the biggest direct challenge it's recieved in that arena since Sonic, and the pressure applied by Sonic led to Yoshi's Island, which I consider Nintendo's magnum opus.
I also think it's good news as someone who has a bit of a mixed relationship with conventional free-movement 3D platformers - legitimising the 3D platformer genre means more people will experiment, and that will mean my biggest issue with 3D platformers, the control/falling-off-of-cliffs issues that would have been figured out decades ago if NSMB and the late-2000s 80s revival didn't cause such a shift in the genre, will hopefully be solved. (if it hasn't already in Astro Bot)