Redesigned XPS Ultrabook
Some changes that I would love to see in the XPS Ultrabook line:
1) Silver keyboard, palmrest, and touchpad.
Silver always looks more sophisticated than black, and while the new dark gray/black palmrest and keyboard look alright at an angle, they appear cheap and plastic-like when viewed directly from above. They don't have to be completely silver, but for an idea of what I mean, see a comparison between the new XPS 14 Ultrabook (left) and the earlier XPS 14z (right) in the image below.
2) Smaller space between keys
Although most laptops now have the chiclet (island style) keyboard, I find the keys on the Dell chiclet keyboards to be a bit shallow and small, especially with the rounded corners. Having a gap between keys is more aesthetically pleasing, but at a cost of functionality. I would prefer slightly larger keys.
3) Left and right click buttons
If I'm the only one who actually uses the touchpad and never attaches an external mouse, then disregard this idea. But I'm used to moving the mouse around with one finger while keeping another rested on the left-click button, and this is very difficult on a clickpad. To maintain a clickpad appearance, which does look nicer, perhaps the touchpad could be divided into a scrolling region above and a clicking region below.