Yes and no.
For analog broadcasts, Australia uses PAL-B/G and Argentina uses PAL-N. Basically no TVs sold outside of Argentina, Paraguay and Uruguay support PAL-N. What this means that if you want to watch the analog signal here from an antenna, you will see the picture only in black and white.
For digital over-the-air broadcasts (TDA), Argentina uses ISDB-T, which is only used here and in Brazil. Nothing is compatible with it, not even TVs sold in Argentina, you'll need a set top box to use it, and it will display fine on an Australian TV.
For digital cable & satellite, these are broadcast in NTSC-M, like in the US. Pretty much all modern LCD/plasma TVs sold in PAL countries like Australia also support NTSC-M. For HD services, it's over HDMI and all HDMI is created equal.
Basically if you don't care about the analog over-the-air signal, just make sure you get a TV that also supports NTSC.