I don't think they have ever restricted faces by Series, only model (e.g. the Noir and Ultra-only faces), so my bet is on it coming to the older watches.
That's been my observation as well. I really like the new color accents for the complications and Hermès logo on the Circulaire face, but based on the pics, I'll bet that's exclusive to Ultra. Hopefully not. Would be a nice update, along with the new face we're getting with the S11 Hermès model this year.
Ok - the white and grey Hermes bands paired with the Hermes face on the ultra look awesome. That alone may convince me to upgrade. Will also get me more life out of my titanium Milanese band.