It is certainly a big deal to me. I didn't intend my post to come out quite so cynical.
In legacy terms, Full Duplex means you can send and receive at the same time. DOCSIS could do that from the start, if not at the same bandwidth. Symmetrical means the speeds/bandwidth are the same up and down. Clearly the cable industry is changing the use of those words, for whatever reason. IMHO it is because one sounds better (to them) than the other.
I agree that 10G (gigabit) is a more accurate term than 5G (generation). I actually wish they would use terms like GSM/GPRS/EDGE/UMTS/HSPA/LTE, but I agree that IMT-2020 is not customer-friendly in the same way. Although eMBB isn't terrible.
FWIW: DOCSIS 3.1 is a huge step forward for cable, and I think it is really cool. If I didn't have fiber, I would want DOCSIS 3.x. If they can deliver on their promises, I might prefer DOCSIS again one day. I am really curious to see what the real-world latency looks like compared to fiber. Either way, I don't foresee my need of wired Internet going away any time soon.
Yes, I am aware what full duplex means. And yes, all modern methods of connecting to the information superhighway can transmit and receive at the same time. I'm not aware of anything that can't. I think you are missing a key component of what this means. It's goes deeper then the end user being able to download a song while uploading a video at the sametime. As stated in the article I linked to, "In Full Duplex communication, the upstream and downstream traffic use the same spectrum at the same time, doubling the efficiency of spectrum use."
Currently, in my area Charter uses 24 channels in-between 531 MHz to 663 MHz QAM on Rx and 4 channels in-between 19.4 to 37.0 on the Tx side. Full Duplex DOCSIS means that all 32 of those frequencies will be used for both Tx and Rx simultaneously, resulting in speeds up to a symmetrical 10 Gbps. There is no changing of words. Full Duplex is the technology, Symmetrical Speeds are a result of the technology. Currently downstream frequencies only are used for downstream, upstream frequencies are only used for upstream. With 3.1FD, the separation is irrelevant. The article and video make it clear that its full duplex on a frequency by frequency basis, not the service as a whole, which as always been FD.
I 100% agree, in mobile it should be refereed to by technology, not some fake generation. One of the first widgets I ever downloaded on Android back in 2010 and still continue to use to this day is Network Signal Pro. The widget gives the type of network it's connected to and real signal strength in dBm. When I had Sprint, and they were first prepping to launch LTE, I could gauge which areas were upgraded and were going to go live with LTE shortly as the network identifier changed from EVDO-A to eHRPD when connected to towers that were upgraded but not live. To me, that was 1000x times more useful then a 3G icon in the status bar.
Now wifi is going down the idiot road. A retroactively named Wi-FI 4 means nothing to me. It will always be IEEE 802.11n in my book.
Due to physics, I don't think you'll ever see latency as low on DOCSIS as on fiber. I get inbetween 12-24 ms latency on my favorite Ookla speedtest server at home, I get a solid 5 ms going to the same server 99% of the time on DIA enterprise grade fiber at work. Fiber is the superior technology, and while DOCSIS does come and will get even closer, fiber will always be a tick or two better.