The letter goes on to give a few more hints about the upcoming 200-plus-mile EV. For example, there's this part about how the Model 3 will be put into production:
The letter ends with this upbeat note:
We expect to generate positive net cash flow and achieve non-GAAP profitability for the full-year 2016. Thus our cash balance at the end of 2016 should increase from the year end 2015 level. We plan to fund about $1.5 billion in capital expenditures without accessing any outside capital other than our existing sources that support our leasing and finished goods inventory. We plan to invest in equipment to support cell production at the Gigafactory, begin installation of Model 3 vehicle production machinery, open about 80 retail locations and service centers, and energize about 300 new Supercharger locations.
We will have more soon after Tesla's fourth quarter 2015 earnings call provides us with some details.
Achieving these results in 2016 should leave us well positioned for 2017, when we plan to launch Model 3 and take another significant step towards our mission of accelerating the world's transition to sustainable transportation.