One of the main upgrades will be an 800mhz FSB, hopefully they wont raise the timing and negate the higher clock speeds this time. I only say wait because Santa Rosa should be out in about a month, and if you can wait til the summer, you will likely see high end DX10 in laptops as well. If i were in the market for a laptop, i would certainly be waiting til the summer before buying.
The code-name Santa Rosa
refers to the fourth-generation Centrino platform, scheduled for release in May with the following features:<SUP class=reference id=_ref-0>
- second generation Intel Core 2 processor (code-named Merom) that uses Socket P
- 800 MT/s front side bus with Dynamic Front Side Bus Switching to save power during low utilization
- Intel Mobile 965 Express chipset (code named Crestline) with Intel's GMA X3000 graphics technology
- Intel PRO/Wireless 4965AGN IEEE 802.11 a/b/g/n mini-PCIe Wi-Fi adapter (code named Kedron)
- NAND flash-memory caching branded as Turbo Memory (code-named Robson)
- EFI, a successor to BIOS
- Intel Dynamic Acceleration (IDA), better Windows Vista Aero support 
The chipset update was originally intended to include WWAN
Internet access via HSDPA
) codeveloped with Nokia 
. After announcing a working partnership, both later retracted the deal citing the lack of a clear business case for the technology. 
Support for WiMAX
(802.16) was originally scheduled for inclusion in Santa Rosa but appears to have been delayed until Montevina in 2008 
. There have however, been reports that WiMax may still be introduced in 2007.
The Santa Rosa platform will be branded as "Centrino Pro
" when combined with the enhanced security technologies Intel introduced with vPro and will be called Centrino Duo when they are not used..