Halcro, see my comments below :
Look at the unipivot design with a stabilising pivot on a sapphire jewelled swash plate to maintain stability
Comment - I would argue this is not a unipivot as the bearing has multiple contact points and the arm does not have a single path to ground.
Look at the total lack of headshell?
Comment - Alphason - one piece titanium arm/cartridge mounting, ET2 - one piece tube/headshell, Syrinx PU2 - no headshell.
Look at the cam-weighted anti-skate designed to increase as the arm moves inwards.
I'll give you this but there have been other solutions to provide increasing antiskate force using magnets, elastomer threads ( Helius ), etc
Look at the jewel-encapsulated unipivot.
Comment - Naim Aro, Immedia Centroid
Look at the tonearm wiring exiting from the top of the arm and how it's supported on a stainless steel hoop frame to avoid any pressure on the arm movement.
My ET2
Look at the azimuth adjustment utilising the actual swash-plate?
Not a unipivot then, the Vector also uses a stabiliser system.
Look at the ability (with the Copperhead) to have additional armwands which can be substituted complete with their fixed cartridges?
Naim Aro, VPI - both complete with counterweight etc.
Look at the counterweight system design with its placement so far below the level of the turntable platter?
Odyssey RPG from 20 yrs ago, Naim Aro, Kuzma unipivot, Blue Note Unipivot, countless others.
Modern arms that have interesting facets - by the way this does not guarantee performance - Naim Aro for 1/2 the reasons you gave for the Contimuum, Roksan Artemiz - pyramidal bearing and intelligent counterweight, Eminent Technology - 1st air bearing tangential that worked, Air Tangent air bearing, Helius - single point allignment of vertical and horizontal bearings that they claim ensures energy hits both vertical and horizontal bearings in phase to reduce smearing, then you get into the likes of the Breuer, Da Vinci where craftsmenship are clearly evident.
You missed the unique counterweight and pivot point at the same height as the record surface.
Answer - Immedia RPM & Centroid.
I'm sure there are many others. I have no doubt the Continuum arms are excellent, and they would be on my short list if I were to upgrade from the Aro, along with the Immedia Centroid. However to suggest they are beautiful and push the frontiers of tonearm science is an overstatement in my view.