I was researching the best micro SD card for my gs3 and came across a few sites stating the future smartphone will start eliminating micro SD cards, just internal memory. That was my impression at least. Here is a sentence I copied to post. This was from just one site though.
"microSD cards don?t actually have too many uses these days, and you should make sure you actually need one before buying one. (Duh, but it needs to be said.) Most high-end smartphones?Android, iPhone and even Windows Phone?only offer internal storage and no microSD slots."
The Best microSD Card | The Wirecutter