Basically. Possible, but very impractical. I think the battery life would suffer more from the load put on the hardware than the actual power consumption of the screen, which wouldn't be much higher anyway. And then there are problems with cost, heat from the high hardware load, performance issues, etc. But that doesn't say much anyway. There are mobile processors and chips out there/released that could perform as fast as our current laptops. It is just very impractical to use. With the same logic you could have a $500 laptop as powerful as a $500 desktop, and it goes on like that.