WTH: No future energy usage/cost predictions in energy dashboard

I think adding a card containing a prediction of future monthly energy usage and cost would be a useful feature for the energy dashboard. I implemented this concept with SQL sensors and templates. My method is to take the average energy usage per day for past 7 days multiply by 30 to predict the total for the month.

Yeah! See also: WTH Expand energy cards so they can easily display a "week" or "month" an "last year's month" etc