From the provided Recapy context, the "new threat to playtime" is Bonnie's Lilypad tablet. Bonnie becomes obsessed with the device, and that digital distraction forces Buzz, Woody, Jessie and the rest of the toys to compete for her attention and makes their jobs of staying relevant/playable much harder.
Note: Recapy currently only has metadata-level info for Toy Story 5. If you want scene-by-scene or spoiler-heavy specifics about how the tablet threatens playtime (features, plot beats, resolution), share more detailed context or ask for a deeper breakdown.
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