Unfortunately Windows 8 WILL BE a total failure. Yes for BOTH desktop and mobile. 100% sure about this. Here's why, it's just TOO LATE, iphone and android have been dominated the market for so long and to make things worse when people hear the word "windows" they don't like it. Windows Phone 7 and 7.5 are awesome OS even better than android and iphone combined in my opinion, but unfortunately nobody pay attention to it! No matter how awesome the OS is, if nobody use it -> FAILURE!. Windows 8 may stand a chance if they change their name to something else e.g: xPhone or xTablet xBox is successfull, if their name was Windows Box, then I'm sure it will fail. Remember, many people thought some group of people are "anti-microsoft". WRONG, they are "anti-windows". xBox is great and believe it or not, a good amount of people who own xBox didn't know it was produce by Microsoft! For desktop users, forcing them to use metro start menu is totally insane. It seems people are not able to comprehend a simple fact. User's "First impression" is probably one of the most important factor to determine the success of a new design. Yes I know, if you spent hours or days on Metro and eventually you'll eventually get "used to" it. Unfortunately, most people WILL BE disappointed the first time they use windows 8 on a PC computer and they WIILL downgrade to windows 7 (This is A FACT, not an opinion, here's why, I tested it out with 10 people, showing them Windows 8 RP on a virtual machine and let them use it and ALL of them are VERY disappointed about metro start menu). In addition to those 10 people that I tested with, the majority of users in this forum feel the same way.