Prices broadly won't go down, deflation is very rare, and usually a sign of something very very bad.
It's still all a function of supply and demand. Any sector where supply can be increased, prices will, broadly, come down. Where demand is decreased (probably not much of a factor as far as what you're talking about here), prices will, broadly, come down.
Whatever happened, my hope was that housing and groceries can become more affordable. I think there are ways to facilitate that, though I don't know if any of it will be achieved. You need more than just good policy, and that's assuming you get good policy.
Fingers crossed. We need cheaper food, housing, and continued cheap (relatively speaking) energy.
We could all use cheaper/better medical insurance, but I have to admit, I don't have a clue how to make that happen, and I handled insurance for a clinic for a few years, so I like to think I know a bit about it. Most ideas I hear make me think the person either doesn't understand the problem, doesn't understand basic economic realities, or both. But, there are many smarter people than me, so maybe there's a way.