Actually, with bigger screen (12 inch), most things can be done on a browser without relying on apps. Even if you need a software program (ie. exe instead of app), you can download it. Multi tasking is definitely better on Windows 10. Booting up and shutting down is also faster, which you will not hesitate to shutdown it to conserve battery when not in use. But for android tablet, it takes time time to boot up and shutdown and if you don't shutdown, it drains battery when not in use and you would not use it as often as your mobile phone to want to charge it everyday like your mobile phone.
I have the predecessor (Tab Pro S) and I love it. I use it sitting down on a desk or cafe. Many have complained that the keyboard case can only have 2 positions and one is either too high and the other one is too low. However, the too low position is great for me as it is like a tablet mode and the visible part of the keyboard is shorter so that you can place the screen much nearer you to enjoy the beautiful 12 inch 2K OLED screen like the size of a 14 inch and use the keyboard to conveniently type when it is necessary. As I am too lazy to touch the screen often, I always use a mouse. It's great for leisure use and I don't think an Android tablet or a Windows Notebook can bring about the same satisfaction on a desk.
I also bought the Pen but it is not a S Pen and does not have the accompanied S Pen menu like those in the Tab S3 or Note series. Also, I can't install Photoshop as the Core M3 processor is not powerful enough. That is why this Galaxy Book, with a Core i5 processor & a S Pen, interests me.