Getting 2 ultimates, her teleporter's functionality is staying the same. New ultimate is a shield generator that doesn't need line of sight and gives an AoE of shields to teammates. Shields from generator are supposed to be a lot more than the 25 she can currently give with her ability. No longer has shield giving ability. {} Picture of new ult. It gives 75 sheilds.

Both ultimates will be getting more hp than current iteration's teleporter, some of that hp in the form of shields, so they don't die as quickly as her teleporter does currently. {} Teleporter HP reduced to 50 from 200, increased shields to 350 from 0. The 350 health from shields will regen if not taking damage for a certain amount of time.

New ability to replace shields, Photon Barrier: Similar to rein shield and winston's barrier. It's a barrier that's projected on a sort of track that moves along. {} Here's a video of the shield in action. (Credits to /u/Fuzzle_hc [+1] ) It has a 10s cooldown.

Minor tweaks to turrets, now you start with 6 turrets and can stockpile up to 6 with cooldown. They also have 10s cd instead of 12s.
Also extended the distance of the left click beam. Not a significant increase, just something to feel better. {}Increased from 5m to 7m.
Will all be on PTR soon.

[edit] They're also adding a "group up" button at the end of games that you can click if you'd like to group up with the random group of people you matched with. If multiple click it, you'll group up for future games.
Also forgot to mention that the Oasis map that was shown at Blizzcon will be on the PTR shortly after Symmetra.

[edit2] Adding information from PTR patch notes