Yup, and NEC now has something new in front access mangement, universal backplanes with replacable LED surfaces with a range of pitches, that can be interchanged and multiple pitched units being able to be used in a single display.
As to physical alignment, I have so often complained about that in any video wall, Plasma, LCD, RP Cube, LASER cubes (I noticed on linkedin that the former Barco HT manager now works for Prysm in Belgium), and Directview LED. Also module matching (management so often done poorly in the past at tradeshows, with the promise that actual delivered units would be correct, but what i have seen the past few years shows people taking care in their demo's, and we can see them upclose.
Many years ago when Mitsubishi led the indoor pitch and with black background the contrast at 4mm, they looked good but from afar, above an IBC booth or later a huge one above a trailer stage with live band by LANG AG at one ISE. Now you can do actual pixel peeping.
Nits are going up aswell, those Mitsubishi's were the brightest indoor displays at 1500 nits,at the time these days you can easily do 3000 or more. Of course they last much longer at lower outputs.
And for studio applications there are coatings. AOTO told me at IBC last September they think that with these fine pitches like 1.6mm and lower they are not required, but I noticed a benefit at ISE last Februari at the SiliconCore, when I made a 30 second testvideo.
what is Barco's current smallest pitch? Barco tends to be able to beat its spec. sheets/catalogs. For instance best used to be 4mm, but later you hear; no we had 3.5 and 3mm aswell.
Three years ago, the Chinese had backed away from 2.5 and smaller, basically below 3mm, as to expensive, too unreliable, heat and lifetime issues, so too much trouble, leaving this to SiliconCore, that had the high-end market to support such product, like TV studio applications, the less known mainland suppliers told me, but a year later they were back, and the Leading big ones from (white) China Leyard and Aoto, and now UniLumen are pushing the pitch towards 1080P equivalent. Monolithic displays are the new frontier. Panasonic and Samsung moving in looking to replace commodicty LCD in retail and so on with margin LED.