^^Yes, for those like me still rocking the Core 2 tech, an SSD is probably the best upgrade you can do, assuming you already have everything else where you want it. I know a lot of people decry Sandforce drives, but I went with the 25nm Corsair Force (since I never put my comp in low power and wanted some space). Zune starts in two seconds. In Skyrim, I only have 5-10 seconds to wait from load to start playing. As long as I don't put the computer to sleep, it should keep working just as well. SSD pricing is much better than it was, though I guess I could've rationalized waiting a little longer, especially with the current state of HDD pricing.
Not many things are CPU-bound. I could max out my OC to 4GHz and be within arm's reach of SB in most circumstances, but I wouldn't usually see that improvement. Admittedly there are a few new features in Sandy Bridge I would like, the biggest being QuickSync. But they need to work out the kinks first. I built my brother a new 2500K build and got to toy with it for a bit to make sure everything was solid. I used a good platter drive, and while snappy, it didn't feel much faster than my computer in terms of overall performance. He used MediaEspresso to encode a couple bluray rips for me. I use MPC Homecinema which gets excellent DXVA performance, but these movies were completely unplayable. I needed something like KMPLayer to view them, but it was too buggy in other regards. Not a lot of programs make use of the newer features, and I don't see much reason to use a media player that necessitates error correction of all things.
It was a breakthrough only because Intel stubbornly stayed with the P4 for so long. They had the Pentium M tech forever, it was no secret that PM was better for YEARS before C2D came out. C2D is a awesome tech, no doubt. I just disagree with calling it a breakthrough when Intel was sitting on that tech for years, and then migrated it to the desktop later. The loser in it all is AMD since they knew of the Pentium M several years before C2D was released, they should have saw it coming that Intel was going to polish that up and then spank them with it on the desktop.
Fair enough. Despite how much time there was from Pentium M to Core 2, Intel ultimately did something with it in their (most?) important market: desktops.