I'm definitely excited for it, as I am for the PS5. I'm not sure if either one will be a day one purchase for me though.
For Xbox, it basically depends on how much better the Scarlet version of Halo infinite is. Halo is really my favorite series, and is the primary reason that I buy Xbox consoles. But, since it's going to launch on the system I already own as well, I don't feel a need to immediately get in to the next generation Xbox. Hugely upgraded performance could change that though.
In any case, I'm sure I'll have one of the next gen systems within a year of launch, and both of them by the halfway point of the generation.