The park is currently in the beginnings of a make-over with the derelict rides and attractions being stripped out and - from the look of it - 'hipsters' being invited in. Work is being funded by the City government and Roman Abramovich, with one of his lieutenants Sergey Kapkov put in charge of the renovations. So there is a new outdoor cinema (where I watched some of the park's security guards - in full uniform - calmly try and jemmy open the storage shed, which could be seen to contain much useful stuff); a beach restaurant (with an actual beach); wi-fi everywhere; new stylish seating areas and many, many new espresso bars. The overall look is planks/boxes of stripped pine, so it is no surprise that Strelka Institute have been involved - they brought this look to Moscow.
If you want to be reminded of the summer, then see Gorky Park's new 'beach' as well as other kind-of-beaches around Moscow via this RT YouTube clip.