Over here were some 'teasers' about 'battery pack' changes for the sedan including: I kept wondering why the plan to change the name from 'ESS' to just 'Battery Pack'. Perhaps it will be totally different technology? For instance LiFePo cells with no liquid cooling? There have also been hints about quick change "pack swap" stations which were supposedly impractical with the old ESS. Anyways, there is a fair amount of anticipation now as to what 'Model S' will look like, but the changes for "Powertrain 2.0" are also supposed to be significant. Lets hope the new 'battery pack' technology addresses the "pump always on" concern that Martin mentioned recently.