TomaTito on 14 February 2017
Updated the OP to reflect the bump 
| Jranation said: Can you switch to another game without closing it? |
Not this, but the leak does mention a quick menu
"The Switch features a Quick Menu. Press and hold the HOME Button for at least one second to display the Quick Settings screen on top of all other screens, including the HOME Menu and any applications. Unlike the 3DS, the active software will not be suspended when this menu is invoked"
http://www.neogaf.com/forum/showthread.php?t=1343614
