When TNG has PADDs, Picard could have just entered the message into a PADD, and handed it to Deanna.
How does that remotely make sense? Their consoles are already networked together through the ship's data system. Why use a less efficient means of doing it, especially in a crisis situation where time is of the essence?
The whole text message thing was just a lame reference to cellphone tech, in an attempt to be cute...
No, it was not. It was a logical application of the computer technology of the Enterprise that has been known to exist since the very beginning of TNG. As I said, the use of "printout" messages as a secure means of conveying commands was established in "Encounter at Farpoint."
I mean, in the scene, they even used the .TXT abbreviation, lol. C'mon...
This statement contains two factual errors. One, they didn't use that abbreviation:
http://movies.trekcore.com/gallery/albums/nemesis/ch19/nemesis565.jpg
Second, even if they had, it would be erroneous to think that file extension refers specifically to text messaging on cell phones. The .txt extension has been used for ASCII and other unformatted text files for decades.
And yes, the screen does say "TEXT MSG SENT," but surely you don't think that the term "text message" was invented to refer specifically to the transmission of such messages between telephones. The word "text" comes from Latin, for Pete's sake. It's existed as an English word for over 600 years.
In Diane Duane's Spock's World, the Enterprise's computer system incorporated the equivalent of a BBS or mailing list in 1980s format. There's plenty of precedent for the idea of Starfleet crewmembers being able to communicate textually through the ship's computer. The reference, there and onscreen, is not to cell phones, but to e-mail and computer networking.
As for the printout message in the series pilot... I'm pretty sure that just meant that the orders would appear on the black glass wall panels throughout the corridors, and that an actual paper printout was not to be utilized.
Well, obviously, but that's not even remotely the point. The point is that it's the exact same thing you're talking about in NEM, and it was a callback to something that was established in TNG 15 years earlier, not a reference to a contemporary fad. (The first text messaging system was developed in 1992, five years after "Farpoint.")