Hi Max
Congrats on your new Mac.
We're expecting Pages to be updated at the end of the month when Apple releases OS X Mountain Lion (10.8).
Apple don't preannounce products, so we're not sure whether this update will be to Pages '09 or a new Pages '12. If it's an update to to Pages '09 it will be free. If the update is a new version (Pages '12) we'll have to buy it at full price (about $20). NB Because Pages is so cheap to buy Apple don't do upgrade pricing.
I thought you might like to know this before you purchase Pages now, just in case there's an entirely new version released in a few weeks and you wonder why you've got to buy it again at full price.
Dale