Many people have iPhones because of FaceTime. If Google can show that you can Duo anyone and it works as well, then they may switch, perhaps even to their very own Nexus devices.
I'm not sure I personally like this app because I'm on Android and I used to have an excuse to not FaceTime friends and family, haha. If they discover this Duo, I may get pressured.
Assuming it ends up on all Android phones. Which is a big assumption.
It's as disadvantageous a spot as you can be in, and Google put themselves there by squandering their multiple previous big advantages.
How is that not a big advantage? Sure it's overdue, but they sold over 1.4B devices without it. It makes their offering more compelling to iOS users who've come to expect FaceTime.
my entire family and friends circle runs on WhatsApp. Photo sharing, video sharing, voice calls, video calls ... anything you can think of. And it does a good job, really good job. I have never interacted with WhatsApp and felt frustrated or lost.
The lack of desktop interface didnt feel like losing something becasue it was never there to start with.
given Google's history, I don't trust them to do a decent UI that works for everyone or the longevity.
Several other search engines fizzled underneath Yahoo's reign, Google would've been no exception has it not been for Yahoo's miscalculation.