Dolphin, the GameCube and Wii emulator - Forums

Actually, the AX HLE is a big improvement of HLE. I wouldn't say, that this is a completely new feature.

Will that mean that audio emulation will work better?

Yep, HLE will be almost as good as LLE.

Yeah when HLE rewrite is achieved. You can have a look to this thread http://forums.dolphin-emu.org/Thread-new...es-it-work

Another feature could be Triforce support merged to Master branch

...or the Wii USB and Wii network support

Delroth has just "confirmed" that here http://forums.dolphin-emu.org/Thread-dolphin-3-9

Keep in mind that 4.0 will still keep us busy for a while, so it's not like 4.0 will follow a month after 3.whatever.