OK, so let's go item by item, shall we?
Let me give you an example of why it's a good thing, though. I have a friend who's a graphic designer, and has been for about 30 years. He's in his early 50's, and has used Macs for most of his career, but a Windows 7 PC since 2 years ago. A couple of weeks ago, his PC died, and I cobbled together a temporary replacement to hold him over until I can get his motherboard, which died, RMA'd. For the sake of curiosity, I asked if he'd want to try Windows 8 since this was a temporary PC anyway, and he said with a shrug, "why not?" So I configured the system (an old Pentium D 915, 2GB RAM, 320GB 7200RPM hard drive, vs his Core 2 Quad, 8GB RAM, 64GB SSD with 1TB HDD) and installed his programs, gave him a very brief (literally, 10 minutes) tour of Windows 8, and sent him home.