Hey there, congrats! I was really looking forward to a tablet made this way. Two Qs: 1) is the refresh rate locked at 60 fps? Or does it vary between 60 and 12

Hey there, congrats! I was really looking forward to a tablet made this way. Two Qs: 1) is the refresh rate locked at 60 fps? Or does it vary between 60 and 120? This is a big deal for me, as I suffer eye strain from low refresh rate displays 2) Why does it cost 'so much'? I mean, what's included in the 729$?