Part of me still wonders what will become of the E3. The style of lights says E3-1000 which isn't of the newest lot, same as the Toreiyu. Some of them are going to hit 20 years in a few more years so I do wonder what they have planned. It doesn't seem too early to take guesses.
I wonder how the view will be though. One thing I noticed on the Joetsu was the fact that the entire line was elevated meant the presence of concrete walls. You still get a nice view with the single decker Shinkansen but it's nowhere near as spectacular as riding upstairs in a double decker. Then again, I guess the main viewing attraction would be the art rather than the windows despite their emphasis on the JR East page!