Synaptics Skeptic

[knockknock]

Synaptic's shares have skyrocketed, but I don't see how buying Renesas (a chip maker) helps them expand their reach. They already have a significant market share in touch technology, and even if it helps speed up R+D to have both the screen and the chip that powers it in-house, is it really worth half a billion dollars? Their current revenue is less than a billion.
Thoughts?
For reference: Synaptics Shares Soar on Deal to Buy Renesas