In a recent interview, Valve stated that they are looking into improving the Steam Deck further, including the Steam Deck 2.
Valve says the Steam Deck 2 is years away
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You'll have to wait a long time for a Steam Deck 2, steam deck
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You'll have to wait a long time for a Steam Deck 2, steam deck
You'll have to wait a long time for a Steam Deck 2, steam deck
I Took Apart The Valve Steam Deck
Valve doesn't plan to release a Steam Deck 2 for at least two years - OC3D
Valve lifts the lid on Steam Deck 2 plans but it's going to be a while - Dexerto
Valve isn't planning to release a Steam Deck 2 for two more years at least
Valve delays Steam Deck Docking Station due to parts shortages - Dexerto
Steam Deck 2: Leaked specs, price & benchmark speculation - Dexerto