Most of you have mentioned is not investment, but consumption. Investments means to use money to make more money in the future. Global investment rates are around 25 % of global GDP. Avarage return on investement ist about 10% per year. In other words: using 1% or 2% of GDP if its leads to an improvement in GDP of more than 0.1% or 0.2% next year would count as a success. I think to expect a productivity gain on this scale due to AI is not unrealistic for 2026.