Yes, yes I can. Pacman does background downloads, Spotify does music streaming, Telegram does voice chat. Firefox does the rest. Mind you, that's the amount of memory when I'm doing it all at once. You won't be listening to music, using the browser, downloading updates and streaming at the same time.

Game streaming and live streaming are done in hardware by the GPU through accelerated encode. System memory is only really used for sending it to the network.