Btw:
- The new stable Chrome 37 should support High-DPI displays out of the box. I can't test it myself, because I'm 1.5 releases ahead with Chrome 38 from the dev channel.
- According to bug reports all Chrome releases have currently no pen support, when Chrome is running in "Metro" mode. Pen support should work in desktop mode. Touch support should work in both modes. It can't test it yet because I haven't got my SP3 yet.
- I see some progress on the power consumption issue in the bug reports, but it doesn't seem to be fixed too soon.