samsung focus was perfect, why cant they make more windows phones like it?

its time for me to upgrade my original focus, and i dont like any of the new windows phones. why did they put a 4.8 inch screen in the new samsung windows phone? the 4 inch screen on the focus was perfect

the new nokia is way too heavy and bulky. i just want a new samsung phone because samsungs have good screens, and great thin light designs

which windows phones are closest to the thin light samsung focus?