I think if anything there will be a small speed bump. Probably No Penryn or extra RAM or anything, but probably higher clock speeds or more RAM on the GPU (they are underclocked a little bit right now, and Apple could offer us a 512MB option for the high end), bigger Hard Drives (160GB 7200 RPM as a standard, 200 GB 5400 RPM maybe) and maybe 2.4 - 2.6 GHz for the low and high end machines.
I am waiting until October, for three main reasons:
- Hopes of a tiny speed bump (it's logical--new OS coming out, bump the specs in ALL of their machines up)
- Saving the $129 on upgrading. $129 is a good deal, but $129 is $129. I don't need the MBP now, so I'll wait and save the cash to spend it on an accessory or something.
- Waiting for Apple to get the kinks worked out. There's a great deal of hullabaloo about the color accuracy / gradients / yellow-green tints on the screens and CPU overheats due to poor manufacturing (thermal paste not being applied correctly). I have faith that Apple will have these problems fixed by October.
Here is the Macbook Pro speedbump history as of now (speedbumps and major upgrades included):
- February 14, 2006: Original MBP 1.83-2.0GHz Core Duo
- May 16, 2006: Speedbump to 2.0-2.16GHz Core Duo
- October 24, 2006: Upgrade to 2.16-2.33 Core 2 Duo, Radeon X1600 is now clocked to 450MHz (before it was underclocked to 418.5MHz)
- June 5, 2007: Upgrade to 2.2-2.4GHz Core 2 Duo (Santa Rosa) and Geforce 8600M
So as you can see, we were having pretty steady updates every few months until they got sparse and now we just got an upgrade a couple weeks ago. I'd say it's safe to wager that in another few months we'll get a small speedbump, which would coincide perfectly with Leopard. That's why I'm waiting.
Just my opinion, though.