The battery dying is actually super interesting behavior. You start getting alerts at 20% left, then 10% left, and then when it gets low enough you actually get a 10-second count-down on the screen. In other words, there’s no surprise it’s coming. The battery pack/cord is also very well secured (if that breaks, then frankly, something else just went horrifically).
The indoor testing was surprisingly cool, more so than I honestly expected it to be (after having ridden many other VR attempts over the years). And as noted, zero issues with sweat/heat/etc, despite 70 mins of trainer riding without a fan.
The outdoor piece, with the ride hardware tweaks, could be fascinating. As noted above, you can imagine tons of bike-computer like scenarios that are in the HUD instead. Other companies have done outdoor cycling HUD’s (and still exist), but they all largely suck. They mostly suck because graphics are pong-style. Apple says there’s 12ms of latency between the outside cameras and what you see. I don’t have a way to measure/validate that, other than to say: There was zero latency. Like, nothing.
While there’s a safety element that can be improved, I’d argue riding this on an empty pancake-flat dirt trail was far safer than just going for a bike ride on most roads in America. 