Would be OK for HTPC, file server, other situations where low cost and/or low power consumption are more important than raw CPU performance.
My old E-350 ultraportable was pretty snappy with with an SSD. It wouldn't be a terrible processor for web browsing and other basic usage, although I wouldn't want one in my primary system. And if you did more processor intensive stuff like video encoding, it would crawl.
edit: E-450 does boost speed a bit, but not enough IMO. GPU gains are solid thanks to the graphics turbo and DDR3-1333 support, but CPU only gains 50MHz. GPU was already fast enough on the E-350, it wasn't that unusual for the CPU to bottleneck you in games instead of the HD 6310. That's my biggest complaint with Zacate, it's terribly unbalanced. I'd rather have the CPU clocked at 1.8-2GHz, even if it meant having to downclock the GPU a bit and sacrifice some performance there.