Now that Dell and Lenovo are running the distribution on some of its machines, and Novell is promoting a desktop version of Suse, the stage is set for a serious change in expectations. It was one thing when companies were using Linux quietly, on back-end systems like Web servers to cut costs or improve saleability. This week’s LinuxWorld Expo show in San Francisco has demonstrated that open source is moving much closer to the front end than ever before, and with that begins another quiet shift, which will probably happen among departmental lines.