Acer keeps the product announcements coming here at Computex, adding a new (and big) Android phone to its new Ultrabooks and Windows tablets. The Liquid S1 arrives with a 720p 5.7-inch display, matching ZTE's Grand Memo in screen size, and marking Acer's first contribution to the five-inches-and-over smartphone club. The phone is bound for Asia and Europe (no US release is planned for now), and it comes appropriately equipped with twin SIM-card slots. There is, however, no LTE radios, something that Acer admits will be arriving in its smaller Android devices first.

Other notable specs include a Mediatek quad-core 1.5GHz processor and 1GB of memory to aid Android 4.2. It's worth noting that the UI here, like we've seen from Acer in recent years, is largely a stock one, both in functionality (the two-finger drag-down menu for settings toggles is here, take that HTC One!) and looks, although there's some additions to the software that we'll outline later. We've managed to get some playtime with the device ahead of its big reveal at Acer's press event, so check out our (literally) earth-shaking first impressions and hands-on video after the break.

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Few trend-spotters would disagree with the following prediction from ARM, but it's worth laying it out anyway: Of the 300 million mobile devices sold in 2010, the majority cost over $400. Within the next two years, however, these "crazy money" products (as a spokesperson described them) may represent just 25 percent of the total mobile market -- still huge in absolute terms, since almost two billion phones and tablets are forecast to be sold in 2015, but a distinct minority relative to entry-level and mid-range options.

In an effort to convert these expectations into an even taller heap of gold, ARM just announced a new mid-range core, the Cortex-A12, which is designed to replace the aging Cortex-A9 while offering a 40 percent boost in performance. This gain will likely come with the added advantage of better battery life, since the Cortex-A12 will initially be fabricated at 28nm instead of 40nm, and will be offered to manufacturers alongside a new Mali GPU (the Mali-T622) and video engine (Mali-V500) that promise further power savings of their own. The Cortex-A12 will also support big.LITTLE configurations, allowing it to be installed alongside Cortex-A7 cores that will take over for low-effort tasks in order make further power savings. Big.LITTLE hasn't really blown us away so far, at least not on the Octa-core Galaxy S 4, but its wrinkles may well have been ironed out by mid 2014, which is when the Cortex-A12 is due to land. Check out the PR for more technical details on each component.

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ARM unveils Cortex-A12 CPU and Mali-T622 GPU in expectation of a mid-range boom