What are the pros and cons if Sony allows MS to crate a 360 w/a internal blu ray

Just wondering if you think this could be a positive for Sony, a negative for Sony, or both.

Its not sony's call to make

Pros.

-Sony makes lots of money

Cons

-As we can see with MGS4 games are BIG so if M$ gets bluray they wont have a problem

-PS3 will no longer be the only Bluray+gameplayer

-Microsft will make more money

people will have to pay 100 extra for it

making the ps3's price even mroe reasonable. and truely a better deal.

cons: my friends get to watch blu ray movies as well as me