The display diagonals of medium megapixel cameras that have been on the market for more than two years range from 2" to 4.8", and the average display diagonal is 2.9". At only 2.7 inches, the ELPH 115 IS has a quite small display diagonal compared to most of the other cameras of this age and type.
We compared all the other 2.7" screen cameras to this camera and we think because of its better review score, the Canon A3200 IS is also worth considering.
If you want a larger display diagonal then you might want to look at the Fujifilm X-E1 (£435.10) (2.9") which also has a higher rating.
What does "display diagonal" mean?