Can someone explain the process using Playstation Now directly on a TV?

So, apparently you can use PS Now directly on selected Sony Bravia & Samsung TVs without needing a PS4.

The PlayStation™Now Beta is available on select Sony Bravia and Samsung televisions. This article provides information on supported models, accessing PS Now, and using the service. (dated 6/10/15)

Despite claiming (as it states above) that the article provides a lot of information, it really doesn't. All it really does is explain how to pair the controller with the TV.

I'm a bit dubious because I know that PSNow often downloads the game to your PS4 but this isn't possible (is it?) on the TV... but I'm hopeful about this because this could be a great, cheaper way of accessing some of the PSNow games.

This help page doesn't specify whether all games can be played, or just a limited selection. Knowing that it's in "Beta" makes me wonder if it's not complete. I'm assuming that you're essentially playing the game over one of their servers but this is also not explained at all.

Does anyone have any personal knowledge about using PSNow via their TV directly without using a PS4? If so, can you please give some detailed information (clarified below) about how this works and whether it's stable enough to warrant the cost of controllers and the PS Now membership.

• Are all PS Now games playable?
• How does gameplay work (I'm assuming it's a streaming process)?
• Is there a lot of lag waiting for data to load?
• Assuming you have "stable broadband Internet connection with 5+ mbps of bandwidth (preferably via an Ethernet cable)", is the gameplay smooth?