Per Git, to recap some of the features to look forward to once VLC 3.0 ships:
- Wayland support.
- Systemd journal support.
- Chromecast support.
- Better handling of protocols like SMB, FTP, SFTP, etc.
- Adobe HDS (HTTP Dynamic Streaming) support.
- HTTP 2.0 support.
- Daala video support.
- OpenMAX GPU zero-copy support for decoding and display on Android.
- VDPAU improvements.
- H.265/HEVC hardware decoding using OpenMAX, MediaCodec, and DxVA2.
- VP9 decoding using OpenMAX.
- BPG decoder.
- A number of new demuxers.
- A Tizen audio module.
- Linux and BSD use OpenGL as the default video output mode now rather than XVideo.
- Direct3D 11 video mode support on Windows.
- Hardware deinterlacing on the Raspberry Pi.
- Batch convert support using the Qt GUI.
While there still doesn't seem to be any firm indication when VLC 3.0 will be officially released, you can always grab the latest builds or compile yourself from Git. Share in the forums most of what you're looking forward to with VLC 3.0.