Check out the annual Horizon Report which describes the continuing work of the New Media Consortiums (NMC) Horizon Project, which seeks to identify and describe emerging technologies likely to have a large impact on teaching, learning or creative expression within learning-focused organizations. The 2008 report - produced as a collaboration between the NMC and the EDUCAUSE Learning Initiative - describes six emerging technologies or practices that will likely enter mainstream use over the next one to five years, and highlights a set of challenges and trends that will influence our choices in the same time frames.
Read or download the report here: http://www.nmc.org/pdf/2008-Horizon-Report.pdf