The New iMac has a SSD and Hard drive Fusion drive, 8GB RAM, Nvidia GPU, and Intel Quad-core CPU, so the average iMac user who also use a similarly price Windows 8 "all-in-one" desktop "with the monitor attach on a thin case" might not see a huge or any difference in performance for most tasks like web browsing, Photoshop, Word Processing, video, sound, editing videos in iMovie or Windows Live Movie Maker, etc.
New iMac (2012) Specs
27″ display at 2560×1440
21″ display at 1920×1080
Laminated IPS display with 75% less brightness
Quad-core i5 or i7 CPU
8GB RAM standard, up to 32GB RAM
Fusion Drive option – 128GB SSD & 1TB HDD
FaceTime HD camera
Stereo speakers
Four USB 3.0 ports
No optical drive, external option available
NVIDIA GeForce GTX 675MX graphics processor with 1GB of GDDR5 memory
New iMac Base Pricing
21″, 2.7GHz Core i5, 8GB RAM, 1TB HDD – $1299
27″, 2.9GHz Core i5, 8GB RAM, – $1799
http://osxdaily.com/2012/10/23/new-imac ... s-pricing/
http://www.apple.com/imac/specs/
