81
Passport-less clearance fully available at Changi Airport, average clearance time of 10 seconds: ICA
(www.straitstimes.com)
This is a most excellent place for technology news and articles.
I am not said I am fine with it. But, if you don't want to comply with their requirement. you can't enter their country and I am sure this kind of paperless and biometric immigration check will come to many countries (UK, USA, Japan, Canada already tested it) and it is inevitable. the only workaround atm is just don't travel abroad.