i would guess double precision support is pretty much a no-brainer. it's a deal breaker for many numerical applications and isn't that expensive (amd/ati have

i would guess double precision support is pretty much a no-brainer. it's a deal breaker for many numerical applications and isn't that expensive (amd/ati have 64 bit support too on the latest firestream cards). fermi's cache, on the other hand, probably implies more trade-offs. but you can look at it as a necessary step in learning how to find a middle ground between gpus and cpus - which is the next big battle.