Google says that Android 2.3.4 will allow GTalk to make video calls (
Video Chat on Your Android Phone - Official Google Mobile Blog). So, I upgraded my Sony Ericsson Xperia Arc to Android 2.3.4 just so I could use Google Talk app for (video) calls.
But, those video icons just didn't show up. I used update software from official Sony Ericsson web site. Does that mean that Sony Ericsson disabled VoIP support from Arc?