Largely, the latest technologies were computerized and needed electricity to be fueled. Communication came by mobile phone - more like a miniature computer with limited memory. As far as the dominant technology, it depended on where in my world you were at. There were places still that depended on pulley system and manpower.
Particularly, in my city, I would say electronic. Electric cars were the 'new' fashion, so most ran on petrol. Petrol being a fuel derived of the liquidated bodies of some creatures long dead. Electricity generation could be provided chemically, mechanically (by wind or water), or by solar power.
The internet was an archive of shared information that I already miss dearly.