Oh my God! Monkey Island is my favourite game EVER and I'm so glad Telltale is carrying on the saga!
In terms of system requirements, it states that you need a 2.0 GHz processor. My system has a 1.73 GHz processor; do you think it'll struggle? I hope not!
If so, I think I'd just have to buy a new computer! I can't live without not playing it!