Thanks, guys

It was surprise for me too that XOrg on N8x0 supports XComposite and XRender extensions, which make possible fast capturing of thumbnails and updating them in realtime. Btw, it should be realtime, but it depends on XServer, which sends messages to Telescope every time contents of windows is changed. I think it is useful feature of Telescope - i can press Home key just to glance on other windows' contents to see if there any updates.

Btw, more functions for hardware buttons are coming soon!