a second.
Now my TV takes about 30s to start up, it's actually constantly on standby mode. It takes a good 5-10 minutes to actually boot from cold.
using the UI feels sluggish, there's proprietary "applications" which clog up the main screen and I'm told it spies on me.
Not to mention: other people with modern TV's have Ads injected into their watching experience, I can't even begin to imagine how frustrating that would be if I were playing a game.
So: TV's are much, much worse than they were 15 years ago. Even if there are more pixels now.