A Nvidia RTX Spark is on display at Nvidia GTC on the sidelines of Computex trade show in Taipei, Taiwan June 3, 2026. REUTERS/Ann Wang/File Photo Purchase Licensing Rights, opens new tab (NVDA.O), opens new tab entry into the AI PC market with its June 8 (Reuters) - Nvidia's RTX Spark superchip last week is less a breakthrough for regular users than a high-stakes bet that a largely unproven concept can find wider appeal, analysts said.