Well after waiting 6 days for images and confirmation that Spirit is still functioning I was actually a bit upset the rover hadn't climbed the outer hills yet. The view in the picture you posted I believe is just from going around the corner a bit, not the consequence of going up any higher. If you look back at the tracks it appears Spirit's been simply wandering around in circles in the general area it got to around SOL 159 or so. Yeah there's some cool rocks in the area but my guess is there are great ones up the hill as well. If we're wearing out that one finicky wheel let's use it up by going uphill. A pilot's best friend is altitude. Now Spirit isn't an aircraft but it seems the logic still applies here (plus we taxpaying tourists deserve those wondrous views).