Yamaha sometimes adds a new feature on an MOTL arranger that follows a flagship model.
When the Tyros1 came out, first there was a stop gap model, the PSR-2100, and it was followed by the even newer PSR-3000, which had a
USB port to save and load data...the Tyros only had the floppy disk.
So, the Tyros2 that followed came with a USB port(actually two).
Next we have the S900, which I would call a stop gap model (although a very nice one), and following that, we have the even newer S910 (more like the T2 and bits of the T3 added), which has MP3 capability and which is not on the T3).
If the pattern continues, the Tyros4 will have an MP3 player (maybe even two).
I'm totally tickled with my S910...it's quite a bargain, and I love bargains.
I'm not sure if the MP3 capability can be added to the Tyros3's operating system with an upgrade...if it can be, maybe an MP3 player will be implemented.
Ian