People may not like Halo, but I GUARANTEE that, Halo 5 will show almost everything the Xbox One can do in its early life cycle. Sure we have almost a year to wait for this, but if we all know Microsoft, tons of $$$ & resources will be thrown at this to make sure their vision comes to life.
Agreed. I personally believe "Halo" (as its currently marketed) aka Halo 5 will be the most heavily marketed game of the series (& likely any 1st party title from MS) since the original Xbox came around, if not ever. Reasons include the push for the console as it begins forming a decently sized community, will have been out for... a year or so(?) and the beginning of the franchise on the new tech (in addition to 343 getting whatever resources they need to show off the Xbox One's power). Let's not forget the likely spin-off web series, mountain dew/Doritos type marketing, and then good ol' tv commercials. Halo movie? or was that a different MS title, I can't remember. Either way, I truly believe MS will fund whatever 343 requires and will market harder than they do for any hardware they have out (surface, phone, etc).
Let's just pray the single player is great and the multiplayer is even better so there isn't a massive drop off of community & players like Halo 4 experienced. Went from something like 70-90k to 15-20k in an incredibly short timeframe.
Edit: In my opinion it really speaks volumes to the importance Halo has to Microsoft by not rushing Halo to be a launch title for initial console sales, especially with claims of rushing the hardware a bit to keep pace with a PS4 holiday release. Hopefully this will shine through upon release.