Apple’s Developer Forums are attracting worried messages from coders who see trouble with apps linked to low-cost (non-HTTPS) sites they host themselves, or sites linked to devices or embedded hardware that can’t be made HTTPS compliant, or large public databases hosted by folks who are unlikely to upgrade to HTTPS by January.
https://nakedsecurity.sophos.com/2016/06/17/apple-ios-to-require-https-for-apps-by-january/
https://nakedsecurity.sophos.com/2016/06/17/apple-ios-to-require-https-for-apps-by-january/