• Big Hurdles
• Client- Side Decorations
• Input Model
• Shared-memory Management
• Buffers, Shells and Surfaces
• Clipboard ('misc IPC')
• Features Lost
• Localisation, Positioning, Accessibility
• Alternative Representations
• Mixed-DPI / Dynamic Fonts
• Audio
• Outsourced File- picking
• Controlled Sharing
• Input injection
• Dynamic GPU Load Balancing
• Dynamic Icons
• Network Transparency
• Client- defined Input labels
• State Management / Config