The Switch is portable, so most of its appeal is for people who have a commute but don't drive. The nvidia Tegra chip is powerful and efficient enough to play ports of games that previously would only have been playable on a home console like DOOM (2016) that you will never play on an iPhone unless you're streaming through the new Steam app. Nearly every game worth playing will end up on Switch.

The first party games have the same appeal as they always did -- stellar platforming in Mario, a mainline Zelda, etc. Whether those interest people is more or less a known quantity at this point (they didn't make the WiiU nearly as successful).