From CNET: Microsoft has announced that it is rolling out a handful of Windows 10 upgrades to a small number of testers. These features are not tied to any scheduled update to the operating system, as the announcement made clear, but they do give a window into changes Microsoft may consider adopting in the future.
The new menu features a more subdued design: the panels have lost their solid-color backgrounds and are now partially transparent. This visually de-emphasizes the panels and makes quick scanning a little easier.
Another feature being tested is an updated Alt-Tab function, which not only calls up active Microsoft Edge tabs (as Alt-Tab currently does), but all current tabs.
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