I'll grant that there's evidence of more low-level activity, but I'm not sure that equates to meaningful change particularly. "Released an app" is a neutral signal on its own, in much the same way that the Unity asset store led to an increase in game releases, but 'more asset flips' isn't really a major change to the gaming industry.

If software development speed has doubled, then we should be seeing not just an increase in apps being released, but an increase in product output from the big players too.