Well, Portugal was pretty damn awful this WC. If not for Michael Bradley giving the ball away for no reason at the end of the match, Ronaldo wouldn't have even had the chance to swing in the cross. That one cross was better than anything the rest of his team did combined over two matches.
The way I saw this WC was that Portugal might have a chance to win it if everyone's on form and Ronaldo's performing. On the other hand, if people are off form and Ronaldo's still injured, they could go out in the group stages, although I still thought that they'd have too much class to sink below the US and Ghana, regardless of anything. Technically, Portugal can still make it through, and with more rest, Portugal's fortunes could improve.
You're right, though, he'll get slaughtered in the media if he doesn't score against Ghana.