I recall seeing an email somewhere in which Valve stated there would be a massive surprise at E3 this year. Most thought they would announce Half-Life 2 Episode 3. So what happened? I already knew about Portal 2.
Yes that was the massive surprise - them talking about something everyone already knows about instead of something new. Indeed no one was expecting that.
Portal 2 with STEAM. ON THE PS3. That's about it, really. It was surprising indeed since Valve always considered that platform minor, whatever happened is up to anyone's guess.