In today's annual shareholder meeting, Elon announced the PowerWall (not PowerPack, as far as I could tell) now supports 5kW power output with 7kW peak, instead of 2kW power output with 3.3kW peak. Price stays the same for over 2x output. "More power to you"! :biggrin:
As a side note, Elon also mentioned that first orders will be prioritized to customers who have or are in the process of installing a solar PV system, in order to minimize costs (since solar systems typically already include the DC/AC inverter, unless it's a micro-inverter/AC panel system).