Not something I've seen so far, though I have only skimmed the thread, but going from a rubber-dome/membrane keyboard to a mechanical one really was my "WOW" moment. I went from a slim Cherry keyboard to a Filco Majestouch (a US-layout keyboard missing the numpad section) with Cherry MX Blue switches in the keys and the difference was remarkable. The thing just makes you want to type on it. My typing speed initially dropped by about 10wpm (but I think this was mostly due to having to adjust to an unfamiliar layout after over 12 years of using a UK layout) and my fingers ached for a few days, but afterwards I got back to where I had been before.
Then yesterday I got another Majestouch, this time with Cherry's MX Brown switches, in the UK layout and the numpad. The keys don't feel as snappy as the Blues, but I find it easier to type on and my typing speed has definitely seen a major improvement now. I actually wish I still had some essays or something to type up because I'm really looking for reasons to use this thing!
I had another "WOW" moment when I moved from Windows to Linux. The increase in speed (at the time I was running a Celeron 1.8GHz CPU with 512MB RAM and onboard graphics) and stability was astonishing, and the fact that I could do whatever I wanted with it was really appealing. Moving to Linux made me learn a lot more about my computer and really get in to a lot of things that otherwise I'd probably have missed out on due to relying on the GUI for everything, when really the command line is where the real power is at. It has increased my productivity massively and cut costs when building new computers, too. It's also given my older hardware a new lease of life and taught me all the things that I now need to know since I've purchased a hosting package with an Ubuntu VPS and am in the process of migrating 'my' forum from a free host to this new one, switching software and generally improving the whole experience.
One thing I never really noticed was mega improvements when changing hardware in my computers, but because of the situation I'm in (I work in IT and have grown up around people in IT) I've never done a massive upgrade, having always received other peoples' old parts, instead making small steps every year or so. For example, I've just gone from a Phenom 9950 to an i7 860, which hasn't made a massive difference. I've noticed one, just nothing that's made me go "ooooooh" or anything. But my friend has gone from an Athlon X2 5600+ to the 860 and is over the moon with just how fast his new system is. I'm sure if I was in the same situation, I'd have thought the same.
