In the modern world advertising for false information can be punished. Yet tech companies have found legal ways to cheat on their product specifications.
My LCD TV claimed to do 1366x768 pixels, as many (most) of them do. But when I plugged it to my computer only 1280x720 (720p) were available. I thought there might be something wrong in my setup even though I didn't notice any resizing effect typical for LCD (blurry when not in native). I only found out the trick with an HDBeat article. The TV does only have 1280x720 real pixels. They only pretend to have more due to the overscan found on analog TVs (analog TVs cut the borders of an image). So there will never be 1366x768 physical or displayed pixels. This number is just imaginary.
Seagate also announced a 750 GB harddisk drive a few days ago. But don't expect your OS to report 750 GB when you plug it. HDD manufacturers have decided a long time ago that 1 GB = 1,000,000 bytes and not 1,024x1,024 bytes. It didn't make such a difference for small disks. But now the difference is 34.75 GB (real bytes). If they keep the same trend, a 1 TB disk will actually contain 953GB (70GB or 5% less).