More execution units and clocking, with the high end being GT3e (Including Intel Iris Pro graphics 5200 with on-package 128KB RAM).
There will be models beyond the 5200 but not likely any significant architectural enhancements until Skylake, about 3 years down the pike.
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.