There are several delivery models one is Government to Government, Government to Business and Government to citizens some trending topics are :
Smart Cities using IoT frameworks
Hybrid cloud setup for Government departments
Digital Government platforms for Citizen facility like public grievances, service helpdesks with various departments related to gas supply, transport services, healthcare services, etc.
Thank you all, I appreciate the contributions... I will take all into my consideration for a new paper I am writing. It might add also to the topic if you know some conferences (new ones) like what Dr. Jumoke listed.
Being a multidisciplinary research field, e-Government "picks up" whatever currently is trending in the IT / IS-fields and puts them into the public sector frame.
Smart cities w. IoT was mentioned above.
Blockchain technology might be another "hot topic" until something else comes along.
Concerning a 10 years perspective, I think the only constant that will remain the same in e-Government research is how we create public value with whatever technology is available.
There is the more somewhat more strategic issues and questions:
often e-government is talked about in functional terms, as if the application of these developments are neutral to the business of government. But It is quickly becoming strategic, interfering with the primary process of government. In the next decade these questions will quickly become more pronounced - they are now starting to crop up in e-governance strategy classes.
big data, AI, semantic web and IoT will lead to 'data driven government' and 'data driven democracy' - what are the implications?
when block chain does result in incorruptible, distributed storage of records over the community of people that keep them, and when secure digital ID's provide secure accession does that change the nature of government processes and its importance for society?
if algorithmic policy and decision making becomes mainstream (but it is more efficient, better, more convenient and faster) how would we like to control the quality of such processes?
initial systems exhibiting these qualities will appear over the next decade, and foreseeing them means better design decisions.