Windows 10 Tech. Preview Leaked build 9901 is Surprisingly More Stable than build 9888, Here's a Quick Impressions

Ok, there's still some glitches. Mine particularly the shift-splitted screen where some third of the left screen exchanges place with the right one, and the middle part goes blank. Screen capture will show it as normal, so I have to take it with my digital camera (update Dec. 23: I forgot to tell you that you can get rid of this glitch by hitting the "switch screen" buttons. It's Fn+F7 on my laptop.),

   Also the famous double account logon pictures (if you log in with Microsoft Account),

   Other than that, build 9901 gives—up to now—none of this 0xC000021A BSOD routine show-ups like in build 9888,

   So until the next official build—unless there will be more leaks ahead—this build is worth to install on your live computer, fellow Daredevils!

   Now, the main impression with this build is that: it has sooo... many improvements, sooo... many new features. It gives a hint that the next official build would be significantly more advanced than build 9879. After all, it would be a jump from internal version numbering of 6.4 to 10.0!
   It can be said that I—among many—is one of so anxiously anticipating the next official build. I have a great feeling it would be awesome!
   Here's some of my quick impressions.

New Taskbar

It's not new like from Vista to 7's superbar, but it's really unlike Windows 8,

   As you can see above, the taskbar is now in opaque (non transparent) color—but I do hope MS will still provide an option to make it transparent.
   Any running program now has their icons smaller than before with additional bold underline to indicate that it's running. The active windows is higlighted.

   Of course the search box is now officially shown. It's actually Cortana (virtual assistant) box. But I don't think this feature will be popular among slow connection users. I'd rather hide it to save precious taskbar space—along with the task view button.

New App Window Design

The app window now only has the hamburger menu button, new minimize/maximize/close buttons, and a left-aligned window title,

   Some apps have their own beta versions like Store, Photo, Camera. New apps also coming like Remind Me, and Contact Support. So, we can safely say that all apps will be new in the final release of Windows 10.
   And, one other thing, maybe...just maybe, all desktop windows will be redesigned to look more like their modern siblings; i.e. black window header, left-aligned title, hamburger menu...? One thing for sure, the desktop and modern context menu will stay different..., or will it? We'll see.

New Features for Consumers

You might already read about this everywhere on the Web. But experiencing it yourself is just way-way better.
   Yes, the FLAC music files support is now default in Windows Media Player. So you can now enjoy a better listening experience with those cool WMP SRS WOW effect and equalizer (I really recommend "techno"),

   Matroska/MKV video support is also available, but still only basic playing. No subtitles, no changing audio channel or other usual features you can have in VLC, SMPlayer, or MPC-HC.
   And of course, some goodies: new wallpapers. Only it's not modern design like the previous gifts,

   If you want to try these wallpapers but don't want to install build 9901, you can get it here:

Windows 10.0_9901.0 Wallpapers.7z (6.53MB, Google Drive)

   But this build is still more than halfway to finish, so we can expect a lot of fun in the Windows 10 final.
   All in all, seeing this build, Microsoft is really heading to the right direction.[]