Looks like Microsoft are entering the handheld market with a ROG Ally-branded device in partnership with ASUS.
Xbox is no longer a console, it's a platform, and it's already entered a battle for control over your handheld gaming PC | PC Gamer
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Xbox is becoming more like PC and Windows is becoming more like Xbox... is Microsoft looking to muscle SteamOS out of the way?
Could be another interesting option especially as Valve's Steam Deck is restricted at retail-level but price will be a huge factor here.
Hands-On With the Xbox Ally X, the New Gaming Handheld from Asus and Microsoft - IGN
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The Xbox handhelds are coming Holiday 2025 and they're impressive, but many questions still remain.