I think only some limited number of people can really predict that.
What you can see now it' that almost all big IT vendors accepted Hadoop as kind of a "de-facto" for Big Data. It means that this technology will be alive for the next five years. However there is a lot of effort from industry and research to other tools and techniques, for example Apache Spark. For some up-to-date information is better to go through "Strata Conference 2014 (Santa Clara, CA)" - https://www.youtube.com/playlist?list=PL055Epbe6d5YX_cD2IDr4dK9Da0Vh6YgI