So basically nothing "new" or unexpected for 2018.
So you expected a Halo reboot and not Halo 6. That's good, you have better source than everyone else :)
For my part, I really love to have a reboot or even another spinoff in the Halo universe but I would have expected Halo 6 to be at E3.
This looks very good overall anyway. Xbox or not, I'm really looking forward for a new Splinter Cell!