HOLD ON! I love Contact. I own it, and the original Sagan book. The point of the ending...OK prior to the cheezy field trip at the observatory thing... When the climactic Senate hearings take place and Matthew sticks up for her... It's all about hope. She found something to believe in, he already had that. What form the alien takes is secondary.
The film provides a platform, a jumping off point, for greater thought and discussion about belief and hope- at least to me.
For me, it is all about STORY and people I care about. I am currently working on the panel for an indie film fest's screenplay competition. I am wading though stacks of other people's work and (worse) having to grade it.
So far, only ONE screenplay from the bin has really effected me. Interestingly, it's ending needs work, in my opinion, but I LOVE THE STORY AND THE CHARACTERS. Give me people I can care for and a good story and I am hooked.
Examples: Still Breathing, Love Actually, The Guru, The Abyss, Appollo 13, Pulp Fiction, Four Rooms, Sunset Boulevard, Interview With A Vampire, Citizen Kane, Under The Tuscan Sun, A Beautiful Mind, The Last Samurai, Rock Star, Boogie Nights, 25th Hour (which I hated the ending of, btw),... Oh, and another Oscar pick -Henry V (K, Branagh)... And on and on ...