Pebble with SIM card

Hello,

Pebble is a nice watch, you all know that. But what would truly make him amazing is if it would had a SIM card, thus making him a complete standalone phone watch.

Do you think it's possible that in the near future the Pebble would have GSM connectivity?

Can ONE connect to Pebble and Car simultaneously?

I am wondering if this is doable at all. I tried to connect the one to the car, but it immediately disconnected the connection with Pebble.

Had anyone else experienced this and is this expected?