There are extension plans, though, for the Tsukuba Express line (from Akihabara) and for the Utsunomiya, Takasaki and Jōban lines (between Ueno and Tokyo), plus a new connection between Tokyo Station and the Asakusa Line (for better connections between the Narita and Haneda airports) and all these will certainly boost the profile of the old Tokyo Station... Probably just in time for the 2020 Summer Olympics.
But what makes Tokyo Station unique is its beautiful building, which, just renovated, looks amazing, especially by night time...
EXIF info:
Nikon Df
Lens: 14mm F/2.8D
Focal Length: 14mm
Aperture: F/2.8
Shutter Speed: 1/60s
ISO Sensitivity: ISO 6400