That is true dead, you will be consuming bandwidth while watching anything through the stb. I once had a limited gb service and they would drop speeds any time I came close to my limit. So, if you're paying for how much you use, have a monthly cap on your download, or using dialup the switch may not be for you.
It's all part of the ever-evolving world around us- some day when any of us talk about fta receivers we'll be showing our age and no-one will know what we're talking about. It'll be known as the good old days- kinda like the BUD days or the card hacking "way back then".
Sooner or later, most of us boxed up or got rid of our outdated equipment. I still have a vcr and dvd player sitting in the top of my closet- keeping some of my old fta equipment company.