There will likely be a revision in the second half of 2019 (more specifically, September) that improves the handheld capabilities and retails for $250 at most; better battery life and smaller size. Alternatively, this revision will ship as a handheld-first system, so a dock and controller for home use would have to be bought separately; as a standalone this revision would sell for $200. The idea is to make Switch more appealing to females in general and be the first step to take over the reins from the 3DS in the lower price segment of the console market, coupled with the crucial releases of Animal Crossing and Pokémon generation 8.
The regular Switch SKU is likely to take the value-added approach, meaning the price remains at $300, but a game is always included. That's something I can already see happening in the first half of 2019 (more specifically, May).