Help with choosing a laptop for both gaming and watching movies

If gaming is not a priority, then I would get the Toshiba with the 1080p screen for overall better general use.

The 1080p screen means that if she is using it to surf, read, write papers (assuming she is in school), then she can see more information on the screen at any single time. If she tends to do a bit of multitasking like maybe typing a paper and surfing the net to do research for that paper, then with a 1080p screen is great for devoting half the screen to the internet browser and the other half for whatever word processor she is using. It can still be done with 1366x768 resolution screen, but it will not display as much information on the screen.

When it comes to watching hi resolution video on a 1366x768 resolution screen vs 1080p, overall the 1080p will provide better visuals because the is no detail loss when watching a 1080p video. However, since a 1080p video cannot be display at full resolution on a 1366x768 screen the video will have to be shrunk down to fit the lower resolution, the means you loose some detail. At a casual glace most people will not be able to tell the difference in video quality. You would generally need to the same video displayed on a 1366x768 and 1080p to be able to see the difference. And there can be some people who will not be able to notice much of a difference. Generally speaking, the more detailed oriented the person is the more likely that person will notice the difference.