If you haven't turned on your Apple TV in the last 24 hours, you may want to. Especially if watching HBO and ESPN are important to you.
Apple announced and released these two new apps to their Apple TV device (as well as others) in the last 24 hours. With the addition of these two new channels (as well as others as shown above), it's clear that Apple is making progress towards offering a true cable-cutter Living Room. I, for one, am really excited about what Apple TV's future looks like.
The free update is available now as part of version 5.3 for 2nd and 3rd generation Apple TVs.