They won't, as they take too long to load up. I loved the idea at first, but when you think you have to pick up the device, load the app, go to the right screen, then push the button to get to where you want to go, it takes far longer than to just pick the remote up and push the button in the first place. Shame really.
Yes. I hate them, as they sound very false and peculiar which disrupts the natural flow of whatever you're watching. Given how decent even the smallest of satellite speakers are these days, I would rather save up a few quid and do it properly than bodge it with a soundbar.