Amusements wouldn't be in the same category as most of the stuff talked about so far, and pinball machines are a sub-category of amusements in trade terms. So complete stuff, whether DP or HomePin is probably going to be unaffected immediately, as Stern's machines to China would be. Some Chinese components to Stern will likely get hit.
But, don't make the mistake of thinking that any of this will definitely go ahead; even the original metals tariffs. This is first and foremost electioneering for the upcoming midterms, and may well be dead and buried before the end of the year.
In general economic terms, there's no prospect of the tariffs directly rebalancing trade - reducing US trade deficit w/ CN. What they will do is damage the US economy more than the rest of the world (which will also take a hit), and devalue the $, possibly quite considerably. Indirectly, that may help US exports in territories where they haven't just been hit with retaliatory tariffs - and devaluing the $ was a stated goal earlier on for Trump. But there's no guarantee that the price sensitivity of demand for imported goods in the US will be sufficient for a dropping $ not to result in a worsening deficit.
Dangerous games.