not all gacha games have a pity system, and a pity system is not part of the definition of a gacha game. For example, Puzzle and Dragons, one of the first major gacha games on mobile, whose gachapon system is literally modeled off a gachapon machine, does not have a pity system. It’s not different. Having a pity system is not a requirement for being a gacha. For example, Fate Grand Order for the longest time, did not have a pity system. You would not suddenly call it a gacha game after it got a pity system, as it was already one before hand.
Steam OS at home IMO will eventually take off. Valve is already about to release the valve(pun intended) to allow 3rd party companies to bundle steam OS on their devices. given that steam os offers almost 90% of the experience of a home console, with a larger library, higher upfront cost, but a lower long term cost(cheaper games, stores don’t expire, no online subscription), the steam os will eventually become the natural competitor to the playstation(imo) to fill in Microsofts absence. PC has already been the dominant non mobile platform in spending for awhile already