The MBP Ram limit is 3GB. I think the Santa Rosa MBP will offer 4GB of memory. Honestly, I know 1GB is a lot, but do you guys think you'll need it? Of course, more the better, but what about the days when 256MB of RAM was standard? Will we ever reach a limit? What if they came out with 200GB of RAM, won't you think that's overkill and that we really won't need that much? I know that chips are becoming more advanced and getting faster and faster, but will RAM reach a limit where we'll end up saying something like, "Okay, we just created a 200GB memory and I think that's enough. If we make anything larger, people won't have a need for it, but 200GB seems to do it". Sorta follows the law of diminishing returns...there's a limit where too much won't be good either. You just need enough... Also, I know that if your computer starts to slow down after opening multiple applications, but is there a more objective way to check if you are in need of more RAM instead of using your "feeling" that the computer is going slow? Is there an activity monitoring screen say add more RAM and all this activity will lessen?