Omg that's amazing. As someone who's riden the Central line most weekdays for the past 10 years, it's long overdue an upgrade. We've had none of the nice things other lines have gotten, like wifi and better carriages.
I hope the unions are pissed. They hold the city to ransom yet all seem to loath their jobs. Just the other day I walked into an empty central line station and there was a problem with my Oyster, I got the attention of the only employee on duty who was sitting in his fish tank using a tablet, he rolled his eyes and waddled over. Silly me for asking someone to do the thing they're paid for.
10 years of threats and strikes will be fun.