You can buy a big-block chevvy power plant for not much cash, and stick it in whatever chassis you like, but you still need to obey the same speed limits and it guzzles fuel. I for one do not want Android if it means poor battery life. I made an exception with the DX100 purely because the SQ is so incredible. The DX100 battery life is a pain to live with, though. Partly due to the amp stage and partly due to the Android chip (which is single core, iirc).
People criticised the Cowon J3 GUI, but, overall, I think it's fantastic, considering how amazingly power-efficient the player is. I'd take it over power-hungry Android any day. The J3 proves you don't need Android in order to have a usable touchscreen GUI.
I wish more DAP makers would follow the lead of the J3 GUI (remember, it still includes hardware player controls, too, so you can control it without taking it out of your pocket, something which the DX100 fails to provide).
Anyway, we're digressing. Thankfully, James and Co. have had the good sense to steer clear of Android on the X3, and I hope they avoid Android for the X5, too.
And, just for the record, my phone (SG2) is Android, so this has nothing to do with me being some kind of Android hater, because I'm not.