Windows 8 is a waste of time and money as far as i'm concerned, they didn't really do anything with it. They just made it look like it's got a lot of new features to it, when all their main focus was probably on the visual.
Windows 9 is going to be what Windows 8 should have been as I see it, just like Windows 7 should have been what Windows Vista was. Windows Vista didn't even have a Video link in the start menu... They just wanted to milk all of the money they could out of the consumers with numerous releases as their method. More releases equals more sales.
Firefox even came out with Firefox 5 not even really a month after version 4, and I hardly see any difference between the two lol. The only thing I see is that they tried to get their visual down, like the way chrome was built, and their speed on their browser suffered for it. Firefox 3.6 is still the fastest I believe.
I created my own complete .jar firefox theme, and already it's incompatible with Firefox 5, after I originally created it for Firefox 3.6. I did however upgrade it to be compatible with Firefox 4, and now it looks like i'll have to do the same for version 5.