I just discovered that it is possible to remotely control your LibreOffice Impress slides, use a laser pointer and do much more awesome things remotely with your Android device.
The app you need to install to do this is called LibreOffice Impress Remote. Google play says that is comes from The Document Foundation, which means that it is official. Start by installing it.
The next thing to do is to open your LibreOffice Impress, go to Tools → Options → LibreOffice Impress → General then enable Remote control. You may need to restart your LibreOffice Impress after this.
Now, Connect to your computer via you Android device.
I only tried this using Bluetooth, I didn’t try it using Wi-Fi.
The fella in the video on the app’s Google Play page explains all this pretty clearly (That video is not from Youtube, I don’t know how to embed it here, you can watch it there)