Well I don't think, at this conjuncture, that it's a good solution.
Once the next version of Windows comes out and speed becomes available to do new processor intensive things then maybe.
And the new version with those plug ins that will hog resources will have some xp users trying to buy win 7 64 systems with a whack of memory.
I'm not against progress, heck I had the first hard drive in town except for IBM and DEC stuff on mainframes, the first distributed Unix network in the province and ran a basement with 5 staff, 2 unix boxes and we printed A/R stuff for 2 nights running, while I tried to sleep upstairs.
68000, 68010 to 68040, Motorola and NCR boxes, and I thought we had a bunch of fun.
I just see too much complexity in the 32 vrs 64 bit thing, it's almost like (don't say this outloud,) that MIDI might die with 32 bit stuff. Tough call.
The other thing of course is the program was INTENDED to be a band in a box, not a short cut for a daw in a box/recording studio.
I repeat the former phrase.
One can argue for hours about 32 vrs 64 bit cowbell, and discuss the merits of the Swiss country side plugin vrs the home on the range plugin and to what extent one should add more reverb. Wow.
So in short: No one can say for any certainty that a 64 bit version will do anything more than maybe load faster or process faster. Will is solve latency?
And again: PG cannot drop support for 32 bit systems, so the level of support would go way up. Then do you know if a 64 bit compiler is available for the language of development? I don't.
I run 64 bit Avid stuff for videos, and 64 bit Open Office (I assume).
Heck just release 64 bit and I'll use it. Why not?
In my kids' lifetimes the program will reside on PG's servers and you'll have a directory there, log in, make music with the latest program in 128 bit, all your files in the cloud, and you'll pay per use, with a certain amount every year for the privilege. Free tickets to the Rock and Roll Hall of fame with your tour guide, East Side Eddie, 50 bucks an hour plus you buy his hot dogs and root beer floats.