My next personal laptop will definitely be a MacBookPro, but I am waiting for two things first...
#1 usable Windows interface, either booting Windows (someone will make a hack soon enough) or DarWine/WineOSX to run Windows applications from right inside OS X (there are even rumors from the MacWorldExpo that Microsoft is going to make an updated VirtualPC for Intel Macs.. no emulation, so it'll be fast).
#2 Faster CPU. I'll either wait for the 1.8 GHz Core Duo to hit $1999 or I'll splurge and get the 2.0 GHz model when it becomes available. Yes, I know the MacBookPro has an X1600 GPU, fast ram, etc, and it's blahblahblah faster than a G4, but if you look at the benchmarks, there are some cases where the 1.67 GHz Core Duo is "only" 1.6x faster than the 1.67 GHz G4. If you look at the raw numbers and at the graph you can see they basiclly mean 60 % faster. Well, I should expect at least that much since the Core Duo is... well... dual core! The G4 was single core and had a slow FSB.
Yes, I know this third generation Pentium M is a very fast CPU, and it's dual core which Mac OS X loves, but I'm already seeing cases where it's only slightly faster than the laptop it replaced. I'm going to wait for a faster version of the Intel Core Duo before I plunk down the money.
(I find it funny that the same people who complained about the G4 benchmarks being unfair are now the same people quoting Apple that the Intel macs are "3x - 4x faster" without reading the fine print. Yeah, the new Intel Macs are nice (much faster GPUs, much faster RAM, dual core CPUs) but clock for clock they're not whoop-ass faster. Some apps, like Modo, are *much* faster under Intel, but many of Apple's existing apps, compiled as universal binaries for both IBM/Motorola PPC and Intel Core Duo, are not even twice as fast under these new Intel machines, which means the single PowerPC core is actually faster than one core from the new CPUs in those specific cases. Still, they're better than the Freescale vaporware and they are much faster than the previous generation PowerBook, and I can't wait to buy one).