The sunlight readable screens on the GliderGuider/Vertica V2 and Oudie 2 are great but I really wish they ran on an OS (like Android) that's not as antiquated and unsupported as Windows CE or Windows Mobile 6.x
With the plethora of Android smart phones, phablets and tablets available with built in GPS/GLONASS capable receivers, barometers, 3G/LTE, etc. and an app store with tens of thousands of apps why would one want to stick with an outdated OS running on seriously underpowered hardware which you can only use in the cockpit?

E.g. Take a smart phone like the LG Optimus 4X HD P880 (720x1280 HD screen with 750 cd/m2 brightness) and install XCSoar from the Google Play store and you're sorted. True HD-IPS display, quad core 1.5 GHz processor, 1GB RAM, hardware accelerated graphics, etc.
Have an outlanding? No problem just take your smart phone and make a call or send an email. Why carry another mobile phone?
When you're finished soaring for the day just pop it in your pocket and use it for the rest of the week.
Even better you get to upgrade the phone for free every two years when your mobile phone contract is up for renewal so you're never left with old hardware which you can't get rid of.

Just my opinion of course.