One script: A curse or a blessing

Wandering through the movie-saturated, intellectually starved wasteland that is Indian satellite television (IMHO), I was struck by one thing - the extent to which the Romanization of Indian language scripts is already underway, whether we like it or not. An increasing number of announcements were displayed in vernacular (Tamizh, Bangla, etc.,) as well as in roman script. This is also becoming increasingly true in the billboards, pamplets and various other advertising media. It is clear that the concept of a Tamil / Hindi computer has not caught on fire. I am yet to see a single person among my acquaintances to use one of those. This leads me to believe that in our lifetime, we will see a total switch to a common script for most Indian languages. I am very conflicted about this, however. I reluctantly accept that a unified script is conducive to cohesiveness and development. It is not a coincidence that the entire European union, including the only Islamic country that stands a chance of being admitted - Turkey -uses the Latin/Roman script. On the other hand, I am sure that many many people will bemoan the possibility of losing the highly individualized scripts that accompany the various languages of India. Language is culture, and script is part of language. I am curious to see if the scientific research that connects linguistic versatility to congnitive ability, also extends to the script in addition to the sound of the language. If eventually we have no choice but to unify our scripts, can we atleast agree on an Indian script? Unfortunately I fear that this last wish opens a Pandora's box.... I dont even want to suggest which script to converge on, though the answer maybe obvious.... Moreover, without a ழ, तामिल will not sound the same.