It's more like the boss showing off the stock price. It gets everyone excited because the company is doing 'well.' The only thing your metrics would do at WWDC

It's more like the boss showing off the stock price. It gets everyone excited because the company is doing 'well.' The only thing your metrics would do at WWDC would be to cement that unless you're the top app in your category, you're not making money, and Apple knows this. As long as they're super popular though, developers will keep trying. Also, why would Apple do anything at their event other than make themselves look great.