A friend of Andreessen built himself a Star Trek-style health dashboard: full genome decoded ($200), blood panels, Apple Watch data, electronic health records, all fed into an AI. It told him he wasn't hydrated enough — and when he said 'do whatever it takes,' it started watching him through his webcam and praising him when it saw him walking to the fridge. The genie is in the bottle. You just have to decide what to ask.