Server-based computing technology works well for many applications, but not for some that are too complex or too resource intensive. VDI, or Virtual Desktop Infrastructure, can solve a lot of these problems, but it also introduces its own challenges. (For example, how can you store and manage all those disk image files?) Late last year, Citrix bought OS streaming vendor Ardence. They then asked me to write a paper for them that sorts out where VDI can be used, where SBC should be used, and how the Citrix Ardence dynamic desktop fits into all this.