Originally posted by: jvarszegi
I was wondering if there are any radical new developments in the works that might be worth waiting until, say the end of the year, for...
PCI Express for laptops will be part of the next mobile chipset from Intel. Besides a faster bus speed, this means that laptops from all manufacturers will start featuring things like upgradable graphics. Since you picked the T42p, graphics are presumably important for you.
Also coming out at the same time will be SATA support for laptop hard drives (and the drives themselves will also start coming out then). The next chipset (IIRC, named 'Nocona' but I'm not sure) will also feature lower power consumption for most of the components, great integrated wireless b/g with low power consumption, and other goodies.
Like eriqesque said, you'll have to wait around six months for these things. If you do manage to wait that long, though, you'll also get the benefit of several screen power consumption reduction technologies hitting the market at the same time, and battery improvements too. If you can wait, I would (and am). Sometime around mid-next-year you'll be able to buy a machine to last you at least five years.
Edit: Okay, it appears that 'Nocona' is the name for a new flavor of Xeon. I seem to have surpassed some sort of brand-name event horizon: future marketing blurbs will just disappear into my brain without a trace, occasionally throwing back just the name without any other information. I'm too lazy to hunt up information on the new chipset, but if you browse back in the AnandTech 'Mobile' section a bit you should find plenty of info.