Exactly my friend! It's all in upgrades, and fancy advertising. Yammie at the heart is a business. They're here to make money! If they give you what you want.., you won't buy the next keyboard (that's most often just a re-pack of the original with minute changes, and a bigger price tag).
For me I'm done buying keyboards that offer very little from one model to the next. I'm saving my pennies for the Mediastation. For less than the Tyros 2 I can have a keyboard that won't require me to shell out $3,000 for the new lemon fresh model. In today's market it makes more sense to me to have a keyboard like this, and it's easier on your wallet
Again just my opinion.
GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.