Here's a review of the Windows 7 taskbar: http://i.gizmodo.com/5131933/giz-explains-why-the-windows-7-taskbar-beats-mac-os-xs-dock
Here's why:
- Expose works the same way regardless of the amount of windows you have, while Aero Peek breaks down once you reach the limit of the screen width.
- While Aero Peek gives you full size previews of your windows, a full size preview is not totally necessary if you just need to identify a specific window.
- Expose allows you to view all windows, or just the windows from one app. The new taskbar does not allow you to see all windows at the same time, while what it does allow you to do is still a slower process compared to Expose, requiring you to move the mouse down to the bottom of the screen, hover over the app icon, then hover over each windows preview individually, then choose. Contrast with Expose where you press a button or move to a hot corner (you do not need to specifically aim for a icon), you see the windows all together (rather than individually), then you click to choose.
It's certainly a great improvement, however combining the distinct functionality of an app launcher and window management into one feature has its limits. OS X's distinct implementation of these functions is overall more successful.
1.It is pretty unlikely that many persons would use 15 windows of the same application, even then only the thumbnail picture is lost (because it is in list view) but the functionally is still there. For example expose breaks down when there are many windows that are very similar in their look.
2.The taskbar also gives a thumbnail view as well so i do not understand your point.
3.I dont know why you would want display all of your windows but you can in Windows by stacking windows side by side (right click taskbar). I would also like to mention that Windows has the aero snap feature. The taskbar can show windows of one app of course. Hovering is not necessary if you change the default view by adding the text labels and it would resize it self intelligently. With expose you have use a hot corner or button, find your place in sea of windows and then find what you are look for. With the taskbar (text labels activated) you just move your mouse and select.