Marco Arment on where Instapaper stands after today’s announcement:
But the more potential scenarios I consider, the more likely it seems that Safari’s Reading List is either going to have no noticeable effect on Instapaper, or it will improve sales dramatically.
Apple has no doubt put Marco in a tough spot. From what I can see the Reading List feature is comparable to the RSS reader in Mail, but with a touch better implementation. To that end I think Instapaper will always be the ‘NetNewsWire’ of the category — meaning it is the app that power users flock to. However, like Marco said, time will tell.