I just installed on my mom's Desktop KDE games. Now she is happier, and she does not need to touch my computer.
On the laptop I got from work (Windows XP, because of non-supported hardware) I just installed KDE4 as well. Using Konversation on Windows just kicks ass. Kate is by far the best general purpose text editor I used. I am not happy that Okular on 4.3.2 does not open PDF (4.3.0 and 4.2 did open.... funky...), but as soon as it starts working again, it will become my default PDF viewer.
While I think Dolphin is GREAT and I started using back in KDE3, I cannot use it on windows, since sftp:// or fish:// protocols not working there... it's just so sad ... :(
I just wanted to thank the KDE on windows team: great job. Just fix the default colors on XP, the applations look kinda dark. That's all!