A bit worried and wondering where in Japan Mark V is (we haven’t heard in a week and it wasn’t sounding too good for his knee), I’ve been checking a few Japanese blogs for any mention and found a Message to Fixie Riders: You Are Not Alone from Neomarxisme that laments hipster fixies and sarcastically acknowledges that
“this is the single most important change in the way we think about mobility and there will be no turning back.”
Check all the comments on that post for the lively discussion. In regards to an important change in mobility, note that that latest issue of Bicycle Quarterly is chock full of old bikes that were either fixed, single-speed or used flip-flop hubs. Example is the 1950 René Herse fixed-gear winter training bike.