In this case "up" is defined by potential profit/chip. There are structural and easy to miss business reasons why it is very hard for any company to successfully move into markets where the profit margins are below what they are structured to expect, and it is very easy for a company to move into markets where the profit margins are above what they are structured to expect.
Intel has to improve their power because a major market for them - server chips - is full of people who want to spend less on electricity for the same computation. Despite this push, they have made absolutely no inroads into the unprofitable mobile market. By contrast ARM, which already has the required power ratios, has every economic incentive in the world to move into the server market. Unless Intel can offer a good enough power ratio to offset the higher costs of their chips, ARM will eventually succeed.
Intel has to improve their power because a major market for them - server chips - is full of people who want to spend less on electricity for the same computation. Despite this push, they have made absolutely no inroads into the unprofitable mobile market. By contrast ARM, which already has the required power ratios, has every economic incentive in the world to move into the server market. Unless Intel can offer a good enough power ratio to offset the higher costs of their chips, ARM will eventually succeed.