Business Elite. With the Elite x2 1012 G1, HP takes on Microsoft's Surface Pro 4. The convertible offers a keyboard dock, an active stylus and an LTE modem. At almost 1500 Euros (~$1690), the complete package doesn't come cheap, however.

Just missed. With the third generation 840-series EliteBooks, HP has big ambitions aiming to compete with the best lightweight business notebooks. But there is a problem that already has a traditional link with the manufacturer.
Update 04/18/2016: Excellent WQHD panel

One is better than two. The refreshed X5 shows that a single more powerful GPU is the better choice against two weaker GPUs in SLI.

The perfect business slate? Dell's Latitude 11 5175 is a Windows tablet that offers a generous portfolio of extensions for its customers. Is that enough to find buyers? We will clarify just how well Dell's Latitude 11 5175 competes against its rivals and where it is situated technically in our in-depth test. Update 2016/08/05:Post test of the Latitude 11 5179 including keyboard dock!

Power dwarf. The less expensive versions of the iPhone have not been a real success so far. This could change with the iPhone SE, because it is very fast, enduring and fills a niche with its 4-inch screen.

Endurance runner. Acer's 13.3-inch subnotebook shines with an outstanding battery life and a fast SSD. However, the screen is disappointing.

Super AMOLED style. The Samsung Galaxy TabPro S is a smart 12-inch tablet that comes with a usable keyboard good battery life and an impressive screen.