CAP, Graphics, Making vids, finding new spots, yes there are plenty if you go looking - As someone said above roof tops! There are so many nice roof gaps in ale town and near kube tower, plus there are a ton of ungrindable pipes on the sky scrapers around downtown.

Plus I found a nice gap to bank on the roof of the tall building halfway down the sewer system thingy opposite where you spawn on the factory roofs. It take a bit of getting to but its worth it for view and gap IMO.

When I run out of ideas I go back to OG or s2 as it always seems fresh, and vice versa when I go back to s3.

The way i see it, Ea probably won't release another game on 360/PS3 however surely a next gen console isn't far off, so they would be foolish not to make one for that system.