A computer is not a novelty. That's really kind of funny that you'd even say that. If you tell me you dive tables to do tech dives, I'd say that's kind of limiting, and also kind of funny.
You can suggest your cheap computer, and then buy another computer... but buying something twice IMO is what I would call wasting money.
Just because he won't use the FULL CAPABILITIES for a few years doesn't mean that it's not a VALUABLE TOOL to use right now.
I think it's funny you assume that all tech divers use computers. I use DecoPlanner or Vplanner software to cut tables for my dives and I dive my plan. The tables are never my limiting factor - it's volume of gas I have on my back. Until I'm willing to spend $10k on a rebreather I'll be stuck in that equation.
I've not knocked the Shearwater. I've read the manual and looked at it several times. I've also looked at the Liquivision. Both great products. But they are a niche. There's a subcategory in the market for this computer. Mostly OC tech divers who wish to move towards breathers. To suggest a new diver pick this up is IMO crazy. Like another poster said - by the time he's ready to need the capabilities it offers Shearwater will have out V2 or V3 with stuff that makes the current version look like PADI tables.