Engadget: When Google unleashed the Nexus 7 upon us earlier this summer we were caught completely off-guard. A $200 tablet that was legitimately good in every regard? It was unheard of at the time, and even five months later it's still a really nice slate. Now it has a big brother, the Nexus 10, this time coming courtesy of Samsung. At $399 it arrives with less fanfare and a higher price, but it also comes with a very distinctive selling point: a stratospherically high resolution.