Pros
Many timed exclusives were seen as true exclusives earlier in the gen and really helped the 360 take off
Cons
I think their effect has mostly worn off and most people tend to expect the vast majority of 360's 3rd party exclusives to hit the ps3 anyway nowadays. For example, we get people posting signs o ME2 ps3 all the time despite aving no concrete evidence IMO yet.
Because of this, those who would have bought the 360 for a game like ME2 would hold off this time (assuming they already have ps3s of course). Even all those JP players who bought the 360 for its JRPG "exclusives" back then probably wont do the same again.
One could argue that its immoral because those JP players may not have bought the 360 if they knew some of those games were coming to ps3. On the other hand, business is hardly moral and the timed exclusives really did serve the purpose for which they were intended and have greatly boosted the 360's status in the industry.
"Dr. Tenma, according to you, lives are equal. That's why I live today. But you must have realised it by now...the only thing people are equal in is death"---Johann Liebert (MONSTER)
"WAR is a racket. It always has been.
It is possibly the oldest, easily the most profitable, surely the most vicious. It is the only one international in scope. It is the only one in which the profits are reckoned in dollars and the losses in lives"---Maj. Gen. Smedley Butler
