So far there are 7 Switch games on my intend-to-buy list for 2019, the same number as I bought from 2017 and up from just one in 2018. And it's only February.
Having said that, none of them look like they will be in the same god-tier as BOTW or Odyssey, so I'm not sure whether I'd say this year will top 2017 just yet. Still, a hell of a good lineup so far and there's still time for plenty more to be announced by year's end. (Come on Doom Eternal)