regardless of performance, 1,2Ghz is quite outdated!
Even for netbooks!
The only good it has is 4 cores, 2 logical core blocks, each with their dedicated 2MB of L-cache, which is much better than Atom's 1MB cache.
Not using shared L-cache makes it necessary to increase cache, cache which uses most of the CPU TDP.
Sad there's no mention of graphics. If you need to add a dedicated graphics card you might be better off with a celeron processor, or ULV core2duo processor, and get an outdated (6 years old) laptop.
If atm's and cache registers are the only things running VIA, then we would not need to expect much of anything graphically if there was something of graphics embedded on this core!
Ow and, for some, TDP is more important than speed.
Especially on netbooks some would rather have double battery life, than loading a webpage 5% faster (or something).
Though I really believe this via will not be much faster than an Atom N570 (which is clocked at 1,66Ghz), unless the program is multi (3+) threaded which very few apps and games support, that are ran on computers of that calibre!
I'm sure most netbooks would benefit from higher clockspeeds rather than more cores!