tl:dr no one knows for sure yet but there sure are a lot of … opinions!
Unity3D Answers: is-unity3d-banned-by-new-apple-sdk-licence
It’s unlikely this language is aimed at Unity, but it could easily become collateral damage in this fight.
Edit 12 April 2010: Jean-Louis Gassée gets it, which is kind of cool for me because when I worked at NeXT I remember visiting Be for their OS pitch, and at the time was too naive to know we were also looking at taking over, I mean, being bought by Apple.