Completely agree with deftonian.
Its one of those things where someone in marketing thought, how can we make a previously unattractive, desktop placed item easier on the eyes and much more desireable. HMMM. Put a picture frame in it. Why not?
If i have to have an external blu-ray burner on my desk, heck ya i'm going to want to put a picture on the side of it so i can look at something i want, not just a box that burns data.
Lastly, to the people asking about who/why/the need for burning blu-rays... To me, its a fantastic cost-oriented external backup option. small form factor makes it easy to fit a lot data in a bank vault somewhere. Removable HDD at your home for easy backup, and then burn backups for a vault, or heck even some "archival" copies of your favorite blu-ray films.