Nvidia Jenson Huang estimates that 9 trillion dollars of cumulative capex on 200 million GPUs is 'reasonable' and possibly even 'too small,' and the NPV math suggests that if AI achieves 'artificial superintelligence' and replaces 5% of the global workforce (worth ~$9 trillion annually in wages), then 9 trillion in cumulative capex over seven years would be NPV positive and justifiable as a single-entity investment.