A news from the netgate blog with week reveal more details about the upcoming pfSense 2.5.0 build.
You can check is in details pfSense 2.5.0 Development Snapshots Now Available
The most interesting part for me is:
AES-NI Not Required
The original plan was to include a RESTCONF API in pfSense 2.5.0, which for security reasons would have required hardware AES-NI or equivalent support. Plans have since changed, and pfSense 2.5.0 does not contain the planned RESTCONF API, thus pfSense 2.5.0 will not require AES-NI.
This will allow broader range of hardware to be able to run this new version.
There is a comprehensive list of new features and changes
2.5.0 New Features and Changes