These are the stock wallpapers bundled with Android 5 ( Lollipop) on the Nexus 7. The resolution is good enough (probably even better) to use them for your desktop PC or lap top, because the Nexus packs a display with resolution of 1920×1200. So each of the eleven wallpapers has a greater resolution than that.
I like the clean, minimalistic look to them and they go along quite well with a Windows 8 OS.
24 handpicked wallpapers for your Android device. The size of the wallpapers is 1536×1024. When you download the wallpaper to your device, you might need to crop it depending on how your phone or tablet handles wallpapers.
If you want at least a glimpse of the look and feel of the brand new iOS 7 which was released last week, you can help yourself with the wallpapers below. I took the originals (which you can find in this post) and cropped them a bit to be more suited for Windows or Android devices. The size is 1920×1440, so standrad ratio but it works well on widesreen devices also.