I don't know the technical reasons, but I've bought laptops for a few of our exec's kids in college - every college has strongly recommended Pro. One said they would accept Home, but certain limitations were imposed.
Before I went into detail reading up on the limitations, I convinced them to just get pro... But the most likely reasons are: Domain (as mentioned before) connectivity and security.
<font color=blue>Outside of a dog, a book is man's best friend. Inside the dog its too dark to read.
-- Groucho Marx</font color=blue>