For the intro, I like to play it like this (it's not exactly 
like the original though):
   G               D
e|-3-3--3---3-3-3--2-2--0h2-3-3-2----------|
B|-3-3--3---3-3-3--3-3--3---3-3-3----------|
G|-0-0--0---0-0-0--2-2--2---2-2-2----------|
D|-0-0--0---0-0-0--0-0--0---0-0-0----------|
A|-2-2--0h2-3-3-2--------------------------|
E|-3-3--3---3-3-3--------------------------|    Repeat


Also where I wrote Cadd9 Csus2, I play it like this:
e|-3--3--3----3--3-3-3---------------|
B|-3--3--3----3--3-3-3---------------|
G|-0--0--0----0--0-0-0---------------|
D|-2--2--0h2--2--2-0-2---------------|
A|-3--3--3----3--3-3-3---------------|
E|-----------------------------------|


The number/rhythm of strums isn't really shown above, but it's not too 
hard to figure it out.  Sorry if it's confusing.


Intro: 
G D x2


G
When I was only 10 years old
G                       Cadd9 G        D (play it like the D in the intro)
I remember thinking how cool it would be
D                          Cadd9 Csus2
We were going on an 8 hour drive
Cadd9                 G
If I could just watch TV
G 
And I'd have given anything
G              Cadd9  G       D
To have my own PacMan game at home
D                                        Cadd9
I used to have to get a ride down to the arcade
Cadd9               G
Now I got it on my phone

Chorus:

Em7 Cadd9 G
Hey
G     D          Em7   Cadd9
Glory Glory Hallelujah
D              G
Welcome to the future

G D

G
My grandpa was in WW2
G                     Cadd9 G  D
He fought against the Japanese
D                               Cadd9
He wrote 100 letters to my Grandma
Cadd9                                 G
Mailed em from his base in the Philippines
G
I wish they could see this now
G                                   D
The world they say has changed you know
D                                Cadd9 Csus2
Cause I was on a video chat this morning
Cadd9                G
With a company in Tokyo

Chorus:

Em7 Cadd9 G
Hey
G    D           Em7
Everyday is a revolution
D              G
Welcome to the future

G  D  G  D


Em7 Cadd9 G
Hey
G     D                 Em7
Look around it's all so clear

Em7 Cadd9 G
Hey

G                D                Em7
Wherever we were going well we're here

Em7 Cadd9 G
Hey

G                D                 Cadd9 D  Cadd9
So many things I never thought I'd see

Cadd9      D                 Cadd9 D  Cadd9 D  
Happening right in front of me


Verse:3

G
I had a friend in school
G                   Cadd9 G    D
Running back on the football team
D                                Cadd9 Csus2
They burned a cross in his front yard
Cadd9                            G
For asking out the home coming queen
G             
I thought about him today
G                   Cadd9  G         D
And everybody who's seen what he's seen
D                 Cadd9 Csus2
From a woman on a bus
Cadd9             G
To a man with a dream


Em7 Cadd9 G
Hey
D              Em7    Cadd9  
Wake up Martin Luther
D              G       D
Welcome to the future
Em7  C  G
Hey
Cadd9 G      Em7    Cadd9
Glory Glory Hallelujah
D          G
Welcome to the future