Disney+ Hotstar offers full HD (1080p) resolution for most of their content. However, they do offer a selection of Ultra HD 4K movies in Malaysia if you watch it on the big screen with the Android TV & Apple TV Disney+ Hotstar app.

No such thing as 1440p. its either 1080p or 4k (but very small selection only). BUT u need to use android tv or apple TV to view that 4k content. cheapest & reliable option is using mi TV stick.

so in ur case, laptop + 1440p monitor = 1080p for All contents.