Nope. Research shows that the level of reflections you get in domestic listening room is insufficient for feeling of envelopment. See this summary graph for example from Dr. Toole's book:Wrong. Yes, it may vary between individuals because of how their hearing works, but I have had the confirmation of those who are also listening in the room that the sound from just the two speakers is "doing the job". Step 1, increase the volume so that the reflections from all the surfaces in the room are adding to the mix - if this just makes the sound, well, sound "bad" then the system has flaws which are too obvious. A highly competent system can be pushed to "ridiculous" intensities of sound, in the room, without displaying any audible problems - there will be point where the average energy of the sound will just be too much, psychologically - and you'll start to feel exhausted, the emotional hit has gone on for too long - and you'll need to chill out, for a while ...
The solid bold dots on the left are the levels of delay in typical home listening spaces. The spreader bars show the prefered delays/levels by listeners. Since sound travels one millisecond per foot, to have 50 millisecond of delay alone would require a 50 foot reflection path. And then you have to assure the level is high enough and it won't be because the sound pressure level drops a lot across that distance.
Multi-channel solves this problem since the direct sound coming out of the rear/side speakers can be planned (in the music produced) to have those delays electronically.
To the topic of this thread, Dr. Toole writes:
And: