If you are in the market for an AIO, you have to go into the purchase decision knowing what you want. A lot of the AIO machines seem the same on the surface with similar screen sizes, but the hardware inside makes all the difference.
The ViewSonic VPC190 is a machine that is certainly capable of fulfilling the needs of the user looking to check email, surf the web and mess around on Facebook. If you are a video and multimedia fan, this is not the best machine for you. The performance of the ViewSonic VPC190 is on par with a netbook, which is much below what you can get in other AIO machines.
The good news is that the ViewSonic VPC190 is also priced more like a netbook than some other AIOs on the market. The ViewSonic VPC190 is more than $100 less than the Gateway ZX4800-06 I tested before. In the realm of things, that's not a lot of difference in dollars, but the performance gap between the two is huge.
Be sure you know what you want to do before you buy. The ViewSonic VPC190 is most appropriate for the user looking for a compact AIO machine for basic computing and little more.