On the Diamond Princess Cruise, they found lung damage in 54% of asymptomatic cases. I would call that a cause for concern.
Plenty of comments implying that we're "all going to get it", which may be pretty much true in some areas in the US and Europe. I'm still holding out hope that being in Australia we may get a handle on it (although we just saw a huge cluster in a meatpacking plant). It's interesting to think that we might be heading for a world where some countries have had 60% prevalence and others have had 0.6% prevalence - what does that do for travel, trade, migration, tourism - all that stuff?
Before you downvote me, think about all the reports of people with VERY low oxygen saturation that "shouldn't be" alert, talking, and feeling ok. That goes against everything we "know" as well, but it's very real for this disease.