GamesDomain has posted what may be the first full EMI review (versus all the other ones we've seen which have been demo reviews or "previews," often of just select portions of the game). Here's what they say about EMI going 3D, for instance:
Fear not, however! LucasArts has done an outstanding job of retaining the original flavor of Monkey Island (mmmm? the taste of monkeys!). The incorporation of 3D graphics enhances gameplay without becoming obtrusive. There's no way you'll mistake Escape from Monkey Island for a first person shooter. In fact, in many ways you won't even notice that it's in 3D as much of the screen remains a static, cartoon backdrop. The key difference graphically is that the characters' features, particularly in close-ups, are rendered exquisitely in 3D.If spoilers aren't your thing I'd recommend passing this review up, as it contains plot points and jokes galore, but if you're still on the fence about purchasing EMI you should definately take a look.
Source: dabomb765