The Horizon as Active Participant: Wider Implications of Relational Information Dynamics

The Relational Information Dynamics framework establishes that the de Sitter cosmological horizon is an active participant in local physics through the KMS entanglement structure of the Bunch-Davies vacuum. The central result — g† = 2cH₀,dS/π² — is a structural consequence of de Sitter geometry, not a coincidence. This paper explores four implications of this central thesis that go beyond galactic dynamics: the cosmological origin of the arrow of time, the independence of g† from Planck-scale physics, a reframing of the cosmological constant problem, and a connection to the black hole information paradox via the KMS condition. These are presented explicitly as implications and open questions, not results.