Press carriers describe the May 2026 Best Buy signal as physical preorder channel evidence rather than digital-only launch confirmation: corroborated (confidence 65)

Slice 28V.8 attached 1 GTABoom tier_2 amplification corroboration (pre-orders may not open Monday despite Best Buy leak). Verdict, confidence_score, and confidence_band held at corroborated/65/confirmed_major_press; evidence breadth only. From corroborated to corroborated. Confidence 65. Evidence added: 1 new source.