Not being tied to the layout via a controller of some sort thru a cable to the track has always interested me. I used the Aristo-Craft Train Engineer on my HO layout when it came out back last century. The TE is now being used with my G-scale trains.
Even back in the HO days I thought of how cool it would be to have "Remote Controlled" trains, much like RC planes, no wires attached. The freedom that offers has always been appealing.
When I got into O scale I wanted to keep it simple, used a Z750 wired directly to the layout for a couple of years, but never liked the slow-speed control or the knob on the control box. After listening to the folks here talk about how much better their engines ran using command control I took the bait and bought TMCC, but only the CAB-1 and the Powermaster, just so I could have a handheld remote. Didn't care much for the BIG RED KNOB either.
It was OK, but the slow speed still wasn't what I wanted and decided to go with DCS Remote Commander.
It was OK, but like a dummy I drove 100 up to Richmond VA to get 1 of my PS2 engines reset so it would run (should gotten GGG to do it, he was just down the street at the time ). Plus the DCSRC still didn't have all the features of full-blown DCS.
Shortly after that I went full DCS, then got the Legacy Lite to run the couple of TMCC/Legacy engines I had at the same time as my PS2 engines...all was GREAT!
Then I got to looking at all the volumes of material needed to use/understand these complex systems, plus I was growing tired of all the noise generated by the sounds coming from the track and the trains, PLUS I kept thinking back to those simpler times of just running trains with a simple handheld remote. Not only that, I was getting tired of the "noise" generated by all the brand name infighting, to read some of the comments made you would think some people own stock in these companies. The "gotta have this or gotta have that" comments really do an injustice to our hobby (why would anyone need a $900 dual-handled transformer to run a loop of track?).
Back in May I started converting my 8 steamers from PS2 to battery-powered, remote-control. Very simple install, with a minimum of paperwork to read over, basically wiring instructions. I'm using a system offered by RCS Australia (Tony Walsham) and couldn't be more happy with the results. I've added sound to 1 engine, but none of the 8 have smoke and if I never put sound in any of them others I won't miss it. NO WIRES to my layout at present (I may wire some buildings in the future with LEDs).
So no, control control doesn't scare me. What really has got me excited is the new system(s) being developed that use the Bluetooth technology, such as BlueRail trains:
http://bluerailtrains.com/
Even though I don't have a device that uses it, once the Bluetooth systems become available for upgrading engines I may have to break down and get a device that uses it. They're even going to offer one for battery power!