Question about AI Capex and stock market and potential earnings growth ( or bust)

A good bit of the stock market is being carried by AI hopes.

If AI does create revenue streams to match the capital investment and the equity prices are justified, where does that leave most of the average day American? Will house prices improve? Will healthcare access and costs improve? Etc.

Looking at the stock market and wondering if it is wise to deploy money more into FAANG stocks via the indices. A market decline WOULD affect the average American adversely. Not sure how many people on Main Street stand to gain if Microsoft, Google, etc. can boast robust earnings.