What is the screen size after you most suited to MALI 450 mp ? Of course it can support 1080p . But I think that the processor will be more comfortable with a 720p right ? refresh screen can be more improved in 1080p ?
It's also worth noting that Mali-450 can scale up to 8 fragment shader cores, so if you really want to push lots of pixel effects (resolution or more detail) it is definitely possible. 1080p isn't really much of a challenge