The biggest push may indeed come from the Steam Deck. A PC in a handheld form factor, that allows you to hook it up to a monitor for a full KDE Plasma desktop experience. Very exciting. If we see a lot of people enjoy it and the Steam Deck is a success, you can be almost guaranteed that more devices will come along and slap SteamOS 3 on it and then also have a KDE Plasma desktop available.
Remember that Chrome and Chromium OS are a thing.