Am still super excited about getting a Haswell 15" MacBook Pro when they are released. However, I can't help but wonder whether this year might be the last year we see MacBook's with Apple's current aluminium design language. They seem to be slowly moving a lot of their products to this sleek, black design language we've been seeing. E.g. iPhone 5, iPad Mini, iPod Touch and now the Mac Pro! I've been planning to make the forthcoming Haswell 15" rMBP a long term, primary machine but would absolutely hate it if the Broadwell iterations have a completely new design language more similar to Apple's other products! I always pitied those people who bought a MacBook Pro from the generation directly previous to the unibody ones! Ouch!
theres no end in the waiting game, God knows what apple is thinking right now....so just get it when you need it.