DDR3 won't become mainstream until 2009, so forget about reasonably priced 8GB RAM anytime soon. 4GB v. 3GB, that's what you'll get for the foreseeable future.
667 v 800Mhz FSB, not a huge increase, and until 800Mhz DDR3 support, no power savings.
DDR3 is irrelevant to current systems, since it requires a new memory controller.
The new FSB's power-saving comes from the fact it can dynamically change frequency a la EIST on the CPU, albeit with lesser savings. Still, Intel's predicted a small saving there (and a bigger one for Penryn, which will be able to disable the FSB altogether when running purely out of L2 and in sleep modes).
http://www.extremetech.com/article2/0,1558,2115031,00.asp?kc=ETRSS02129TX1K0000532
http://www.anandtech.com/tradeshows/showdoc.aspx?i=2845&p=4
How much powersaving can be expected with SR is debatable for now (NAND flash drives/Robson tech may amount to rather meger energy savings and slightly faster boot times will not be a great marketing point- the major benefit of Robson. Montevina/Penryn should be more significant advancements than SR/Merom, but that's more, far more than 6 months away at best.
Hard to say. If you're hitting VM, caching the static code pages of executables is a fair win in terms of reducing HD thrashing. Of course, that's an implementation detail. That's where the real win comes in, by reducing HDs thrashing as they try and swap both data and code pages back in, especially on notebooks with their comparitively slow HDs.
Of course, adding more RAM is a much better solution, but flash is really cheap. Beyond that, it gives Intel another bullet point -- and most people don't understand what it all means, so more bullet points is generally better, thus explaining the really ludicrous "features" one finds listed on packaging/ads...
http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=2971
Robson 2.0 with Montevina maybe academic- if NAND mem. for SSD's result in
price competitive 128GB or higher capacity SSD, should Montevina not be released until summer 2008.
Indeed, but that's quite a big "if". Intel's solution also means that as SSD prices drop you can keep most of the advantages of an SSD HD and still have the cheap prices of the rapidly-increasing traditional HD.
The SSD guys don't expect price parity quite so soon, but who knows; prices crash. Just look at RAM.
Additional hardware upgrades besides SR chipset/platform are what make the SR MBP/MB/iMac a more interesting possibility.
http://www.anandtech.com/tradeshows/showdoc.aspx?i=2845&p=2
I agree (and said as much in one of the SR threads). The above was to specifically answer a question on Santa Rosa itself.
Santa Rosa per se doesn't bring a huge amount to the table; it's an evolutionary step and arguably its biggest selling point in terms of hardware was the WiMAX integration that was dropped. The other big selling point would be the remote management aspects that presumably put the "Pro" in "Centrino Pro", which isn't terribly relevent here.
Other options such as a long-overdue better GPU (and, I read, GeForce Go 8600's are due in April), LCD backlighting, etc. are rather more interesting.
I do wonder how long Apple's known of the Leopard delay. Some are convinced that no new hardware will appear until Leopard, but if the plans had been to do that, then the hardware was originally planned for June, and hardware has a much longer lead time than software.