I guess this is bad, somehow, but eh...if you've got an Android phone you're already updating Play Services pretty frequently anyway, so, I'm not sure what the ramifications here are one way or the other?
Anecdata alert: On my main test phone, Play Services consumed more network/battery than anything else. (Admittedly, I never use that phone for games, phoning or really anything except testing a single app). So I deleted Play Services and its relations, so I could measure my own stuff better.
This looks like they expect HTML5 mobile games to become more popular in the future. This means browser games will be able to access the same features as native ones.