Within the framework of Geodesic Brane Gravity, the deviation from General Relativity is parameterized by the conserved bulk energy. The corresponding geodesic evolution/nucleation of a de-Sitter brane is shown to be exclusively driven by a double-well Higgs potential, rather than by a plain cosmological constant. The (hairy) horizon serves then as the locus of unbroken Z_2 symmetry. The quartic structure of the scalar potential, singled out on finiteness grounds of the total (including the

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... component) energy density, chooses the Hartle-Hawking no-boundary proposal.