It feels good to see KDE 4.3 mature. Again it feels good to see some of the major but conservative Linux distributions turning up to KDE 4. PCLinuxOS has set a complete KDE 4.3 repository ready for those interested in this new and much-hyped desktop environment. Slackware 13 is loaded with KDE 4.2. However, it feels very bad that KDE4 doesn't deliver the stuff hyped much earlier. Read on to know what I exactly mean by "hyped stuff" but don't start kde4-fanboyism.
The worst hype about KDE4 is that it's more responsive than KDE3. It's a complete false statement. I have tried OpenSuse, PCLinuxOS, Mepis, and sadly, Fedora, on top of KDE4 and 3. Sorry friends, I could not see any major difference in performance. On the contrary I have seen lack of performance while using KDE4. "KDE4 uses around 40% less resource than KDE3" is another biggest hype that moved across various OSS forums. It's again a false statement. True, KDE4 manages memory more intelligently, but not 40% less.
I am sure, KDE 4.3.1 is way more polished and advanced than KDE 3.5.10. It looks stunning. It's enviable to all - KDE 3.5.10, Windows 7 and Mac OS X Snow Leopard. But it is not as tightly integrated.
Good news is that Linux Kernel 2.6.31 has much possibility in terms of desktop performance improvement. And it seems, KDE 4 will stood up to its hype when it couples with this nice kernel. Till then I am sticking to KDE 3.5.10 on PCLinuxOS MiniMe.