A new "Embedded styling" renderer has been added which exposes OGR feature styles, allowing QGIS to automatically symbolize data from certain datatypes which have integrated style information, such as KML or TAB files.
This feature implements QEP-209
Support should extend automatically to all GDAL drivers which implement the OGR feature style API.
Currently only supports line symbol conversion, but point and polygon symbol support is under development.
This functionality also supports the direct conversion of embedded symbol renderers into categorized or rule-based renderers. This enables QGIS to automatically create categories or rules which define symbology based on the relevant feature IDs: