Ars: "We've finally had a chance to get to know the PSP Go in detail, and here are our thoughts: this isn't aimed at a clear market, it's more expensive in every way, and it takes away the choice of gamers. When your older, cheaper hardware is better and more able than your new offering, you need to fire some designers.
The new, UMD-less PSP Go is an absolute dream for Sony. Since it lacks a way to play games purchased at retail, Sony gets to set the prices for every piece of content bought on the system. Who cares if the store down the street has a game for $10 cheaper? You can only get your games from one place; competition with discounting and used games is gone. Sony will now be selling you every game that goes into the Go's 16GB of storage, and without the ability to buy or sell used games, Sony now owns every single piece of the market with this system. And without an easy way to switch the battery for hacking purposes, piracy won't be as easy."