As an aside the x140e is about the cheapest Linux laptop money can buy. It's built like a tank for school kids, and has nothing exotic inside. You can replace the HDD with an SSD, and upgrade the RAM (shared video / system RAM) up to 32GB I hear. It's not a particularly speedy machine, but it runs well enough, and the price is right.
Expect it would be messy to work with for photoshop. For example, it recalibrates if you hold it down too long, and then creeps away when you release it.
Idea for precision work: small trackball and scrollers built into the side of the laptop (like a port).