I personally would say the tvs would be best the bigger the better, but you will probably find you complete your cockpit well in advance of msfs going multi monitor, then you need to make sure that your pc can deal with 4 screens that’s a lot of you power your going to use.
TV’s/monitors will probably deliver the best value for money and ease of use.
While you can do incredible things with projection they require more space and for very fine results higher quality devices and optics will be a great deal more expensive than the cost of a few flat panel TV’s.
Installation and alignment technique is also more complex.
As noted, FS2020 still doesn’t support multiple monitors and I would wait to see how Asobo implement this before making any multi projector/monitor investment if it is just for this title alone. (Will require the ability to define viewports for each display channel in order to be functional)
It has also been noted that pushing a lot of high resolution displays will require a lot of PC power with enough output channels at the GPU to support the number of displays you will use. This should also be factored into your budget.
You can technically make it work now, if you go multi-channel with Wideview 2020; but that means 4 or probably 5 PCs, plus all the difficulty and expense in getting 5 copies of the sim to work all at once. But it is possible - I think there are a couple of cockpit builders here using Wideview.
I’m waiting for the multi-monitor support but just based on previous disappointment I am expecting it will not be enough for this kind of use-case and performance will probably be significantly impacted.
FWIW I just pulled down my projector-based system (based on P3D) and am facing the same decision as OP: a new, better projector-based sim or moving to TVs. There’s pros and cons for each.
I had the 3 projector curved screen , yes it was cool but alot to set up and using software to curve or bend the image does work, well sort of. All your buttons and desktop icons are not in the space that they appear you kinda got to hunt for them. The software bends the image but as far as windows is concerned they are still on a flat screen . I now have 3 - 55 inch curved screens and this the best i have had and they are 4k so its very clear. Yes you have the Bezel but you dont notice them .. 4k ultra short projectors would be nice, Very light and you can make a very large image, but for 3 of those your looking at $5K or more.
I have a 180 + degree view on fs9 using 2x projectors and one tv ( 1x fwd ,1x right ) ,with the 37" tv pushed against the left screen,Wideview software.
If I did it all again I would use 1x projector for fwd view and 2 x tv for left/right sides .Yes there is the usual problem of scaling in that if you move your seat position too much the views don’t blend/merge together properly,but you don’t need warp software.Nothing to stop you angling 2x tv leaning gainst the fwd aircraft screens with bezels meeting at the centre struts,side views doing the same on the front side struts,just choose the correct size tv dimensions to suit the cockpit size.A lot depends on your budget,I built mine on a shoestring?? budget £5k ish(3× pc,2 projectors,1 tv Cpflight modules,homemade throttles/ overhead ,backlighting,yoke etc etc etc,10 years ago prices.
If you use 4 tvs then some of the bezel joins will no doubt be visible.I could see the join of the bezel on my left side tv where it merged with the Front projector,so all I did was increase the width of the cockpit window struts which then hid the ‘join’,so you will probably have to choose between exact replica of cockpit dimensions and visible bezels,or modified cockpit to hide the joins.I see a lot of enclosed cockpits with the joins clearly visible,in my case that would be an immersion killer so I went out of my way to hide the joins including blurring / misting the cockpit window in small areas as required.
Yes you are right! I will probably buy 4 Tv like the TCL 50C725 with « Bezels less » and play with angle and joins of the cockpit like my picture (red = TV / blue = cockpit)