Advantages Of Whiteboard Walls Over Other Collaboration Tools

Whiteboards vs. large sheets of paper:
According to Megowan-Romanowicz and others who have observed students using both whiteboards and paper, whiteboards are better at encouraging students to collaboratively work out and share ideas.

Whiteboard Walls vs. chalkboards:
In theory, you could use a chalkboard for any pedagogy that uses a whiteboard. But they are dusty, hard to erase, and hard to see, so unless you happen to have a lot of chalkboards that you can't get rid of or you have a severe reaction to the smell of whiteboard pens, it is not recommended.

Whiteboards vs. tablets or smart boards:
Electronic solutions, ranging from tablets that students can use at their tables to large presentation screens that students and instructors can interact with.  However, it can be too easy for students to get distracted by all the bells and whistles of these technologies and interact with the technology rather than each other.