The move has been completed.

The machines in Kumagaya were moved to VGM Robot@Fukaya City and Odawara City (details undisclosed), and Galaxian 3 is now located at VGM Robot.
The machine moved to VGM Robot is not playable during normal operation, but an event will be held on April 7.

The announcement post is ...
https://twitter.com/VGM_Robot/status/1775427711047237682

Location of VGM Robot is ...
https://maps.app.goo.gl/RVsnGS4iE6CS7JFi9

At this timing, "the Museum" is being featured on the stream.
It will be brought up several times in the future.

https://www.youtube.com/live/D-xtSp7lST8?si=mZdNf9Uc1EsZLtIA&t=3370

あそぶ！ゲーム展 (playing with games exhibition)
http://www.skipcity.jp/vm/game/ (Japanese Language only  )
Exhibition will be held October 3 to February 28.
at SKIP CITY Visual Museum ( Kawaguchi City, Saitama Pref. , Japan )

You can play the game are as follows:
"Tennis for Two"  1958/BNL
"Spacewar!" 1962/MIT
"Computer Space" 1971/Nutting Associates
"PONG" 1972/Atari
"Speed Race Deluxe (Wheels II)" 1975/TAITO
"MANEATER!" 1975/PSE
"DEATH RACE" 1976/Exidy
"Breakout" 1976/Atari
"Space Invaders" 1978/Taito
"Gee Bee" 1978/namco
"Atari Football" 1978/Atari
"StarFire" 1978/Exidy
"Galaxian" 1979/namco
"Heiankyo Alien" 1979/Denki Onkyō
"Asteroids" 1979年/Atari
"Pac-Man" 1980/namco
"Crazy Climber" 1980/Nichibutsu
"Scramble" 1981/KONAMI
"Space Fury" 1981/SEGA
"Donkey Kong" 1981年/Nintendo
"Moon Patrol" 1982/IREM
(Part of the game machine is limited to the date and number of people that you can play)

Update: I just got a reply from the uploader of this video. As it turns out, there was an Open Beta Test that he is in. (... How could I miss that?!) 

Sorry for the bump, but anyway...

Several months ago, a gameplay video was uploaded: https://www.youtube.com/watch?v=9yWF9rQpJFg (idk how to display video on this forum)

Approximately 18 Minutes long worth of gameplay footage. Question though: How did he get the unreleased game / the build of an unreleased game?

Please forgive me that you described in Japanese because there is no time to be translated into English.
英語に翻訳する時間の余裕が無いため日本語で記載することをお許し下さい。

New Space Order はロケーションテストが東京と新横浜にあるインターネットカフェ2ヶ所で行われていました。
専用筐体ではなく普通のゲーム用PCを使っていたため、リプレイデータ（※）を画面キャプチャすることが可能でした。
（プレイ中のデータをキャプチャすることは当時の状況では難しかったはずです）

（※）よく動画を見るとわかるのですが、あの動画ではユニットを直接操作していません。画面表示の位置を変えていただけです。

I understand what you mean Tom#2-JP. I, too, had limited time to be online for free (free internet for 20 minutes).
As for images, they didn't take long to download but videos would take a hour or so.
It must be good to have internet that is faster than 56k now would you think?
Although a text dairy can send as much information to the user unlike video and images in the way we use internet today.

You guess what "now" you are it's selfishness, "in Japan at the time" the opinion was mainstream.
I only stated the facts.

Even if there is something opinion on this matter any more, you're not going to answer me.


あまりにもしつこいと来なくなりますぜ。(←重要)

The site is entirely in Japanese (in which I got a headache from reading some of it... ) but it provides a few links to some images and videos (which I have not checked out).

in 2001 or so, Web page in Japan was mostly text.
in the days of analog modem (56k) , could we get a 5MB file from the server easily and quickly?

Seems we might be doing a family vacation to Japan over Christmas - is the museum open to the public and if so where is it located in Japan?
Thanks,
Paul.

The museum has been determined that opened on September 23, is expected to open later undecided.
In addition, during the Christmas period would not be open for staff busy with the day job.

What would be the minimum empty space to leave between the walls and the Theater? Can it be assembled against the walls?

no empty space for the Theater.
It has opened a space in the photo above is due to a circuit breaker or put things.