Older devices only support 1024x1024. On the other hand, iPad 1 and 2 support 2048x2048 and iPad 3 supports 4096x4096. If you're using automatic image scaling, most probably you have a half sized (758x758) texture and this texture will be used on older devices automatically. Therefore, there won't be any problem.
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Older devices only support 1024x1024. On the other hand, iPad 1 and 2 support 2048x2048 and iPad 3 supports 4096x4096. If you're using automatic image scaling, most probably you have a half sized (758x758) texture and this texture will be used on older devices automatically. Therefore, there won't be any problem.