Reddit mentions of RCA 10dB Video Signal Amplifier

Don't be super surprised if your TV doesn't pick up the Atari's signal very well. I have a few 2600s and they display a pretty fuzzy screen to my newer TVs. I ended up getting this amplifier and it makes all the difference. Also, use the thickest, most shielded cable you can.

Antenna: I have one of these RCA antennas on my roof that's split to my two TVs, for the older Sharp TV with the better tuner it gets everything possible including channels from Baltimore (I'm in NE) but recently has "dropped" the 30.x channels (Russia Today and some Korean stations, no big loss to me) while the newer Vizio apparently has a worse tuner and gets about 75% of those channels (no 7.x, no Baltimores). I previously had a interior "window" antenna connected to it, it received even fewer channels then. In both cases using a signal amplifier helped get a few more channels. Moral of the story: Roof antenna best, interior antenna just OK, signal booster good, the tuner in TV makes a difference- but there's no good way to know how well your tuner works til you try. Certain antennas work better with certain frequencies and stations.

Streaming Boxes: I have the Roku3 and am pretty satisfied with it, using it for Amazon, Netflix, USTVNow (see below) and Youtube. I also have an external hard drive with media on it connected via USB. Generally works well and is responsive, doesn't lock up that often. I also have an Android box, the Matricom GBox-Q that's a bit more open to 3rd party apps and whatnot. It's a neat idea but buggy in execution most of the time. I use it mostly for watching stuff on hard drive (it's better than the Roku at that) and maybe finding some weird European sports and alternative internet content but I find myself using the Roku to watch Netflix by default most of the time. My buddy has the FireTV and likes it, especially the voice control. I had an AppleTV for a minute, didn't really like it though the AirPlay feature with other iOS devices was nice.

Channels: I'm a big fan of a lot of the OTA channels and there's a bunch that you can't get on cable. Noteworthy are: 4.2 ("classic" TV shows like Magnum), 7.2 (the "whitebread" channel, Brady Bunch/Gomer Pyle/Patty Duke et. al), 7.3 (Comet, a poor man's SciFi channel), 9.2 (if BET was any good it would probably be like 9.2), 14.2 & 14.3 (older movies, 14.2 is a lot of b&w while 14.3 is westerns), 20.2 (called Movies!, a lot of good films, some not so good), 20.3 (used to be Spanish, just turned to all cop shows I think), all 9+ PBS channels (22.1-2-3, 26.1-2-3-4, and 32.1-2 . Plus some other stuff for NoVA and Baltimore if you can get em), 50.2 (classic sitcoms) and 50.3 (movies from different eras). There's ION TV at 66.1-6, which is supposedly "positive" TV but 66.1 only shows dead body shows (Criminal Minds, Law & Order, et. al.) and 3, 4, 5, & 6 are all shopping. 66.2 is kids cartoons, but not ones that grownups would really watch. 30.1-9 is a lot of foreign TV. There's a full lineup of what's available here.

Services: I have Netflix and Amazon Prime as well as a free account for USTVNow. Netflix and Amazon Prime have a lot of similarities in their catalogs though Netflix has a lot more original programming each day. I'll probably let Prime expire next time it comes up. USTVNow was originally conceived to let US troops overseas get to watch US TV but has morphed into a general service. Signing up for the free version lets you stream all 7 of the major networks, but no hi def after 45 days. Their pay service gets you more channels (ABC, CBS, CW, FOX, NBC, PBS, My9, A&E, Animal Planet, Bravo, Cartoon Network, CNBC, CNN, Comedy Central, Discovery Channel, ESPN, FX, Fox News, History, Lifetime, National Geographic, Nickelodeon, Spike, Syfy, TBS, TNT, USA, AMC) for $30. But that's almost the cost of cable, and you're paying internet costs to stream it.

Sports: Plenty of college sports, NASCAR, and golf, expect NFL football only on Sundays, sporadic baseball and hockey, almost no NBA basketball (want to watch the Bullets? Go to a bar). You'll find yourself starting to watch the X-Games and American Ninja Warrior more often. The only saving grace is when you finally do get to see a TV with ESPN on you'll realize it's 90+% guys in suits yelling stupid at one another and not actually sports coverage.

Haven't had cable in years now, haven't regretted it. Sports and Adult Swim are about the only things I miss.