right now the chests are the same, they have SPS in them. I don't know what will be in the new chests for sure, since they are still working on them.

I do know they plan to come out with reward points to buy the reward chests for soulbound cards in the next few months, but I don't know if they plan on adding anything else.

So all we know is they are shifting the SPS that was in the chests and adding it to the ranked play distribution when that change happens, so the SPS will be gone in that release (but added to the ranked play totals).