1. Development for proprietary mobile platforms (such as iOS/ObjectiveC/Swift and Android/Java) will drop in popularity.
2. Continuing increase in client-side JavaScript/HTML5 popularity. The dominant platform will be ES6/React not TypeScript/Angular2.
3. The "App Store" will start to loose its relevancy.
4. Mobile (vs. web) usage continues to grow.
And for business:
5. Social networks coming out of Asia (China, Japan, Korea, SEA - such as WeChat or Line) becoming globally popular.
6. Crash/collapse/accounting fraud scandal in a major internet company. (No idea for specifics but look at the ride subsidies of uber for an example of something that can go wrong).
7. Xiaomi starts selling in USA and Europe with considerable success.