Photoshop is a completely limitless program, and that's why so many people enjoy working in it. From beginner to advanced you can always find something new to learn with Photoshop.

When I found this artist that does some work for top brands like Nike, Samsung and Nokia I can't help but get inspired by the work being created. He does it all in Photoshop with no help from any 3D software. Beautiful.

You can check out his work here: Peter Jaworowski

A tip: You can use the arrow keys on your keyboard to navigate through the gallery. Pretty slick, but I wish I could enlarge the previews.